22113504 has 108 divisors (see below), whose sum is σ = 73198944. Its totient is φ = 6314112.

The previous prime is 22113503. The next prime is 22113521. The reversal of 22113504 is 40531122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22113503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13329 + ... + 14895.

It is an arithmetic number, because the mean of its divisors is an integer number (677768).

Almost surely, 2^22113504 is an apocalyptic number.

22113504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22113504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36599472).

22113504 is an abundant number, since it is smaller than the sum of its proper divisors (51085440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22113504 is a wasteful number, since it uses less digits than its factorization.

22113504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22113504 is about 4702.4997607655. The cubic root of 22113504 is about 280.6849895477.

22113504 divided by its sum of digits (18) gives a triangular number (1228528 = T₁₅₆₇).

Adding to 22113504 its reverse (40531122), we get a palindrome (62644626).

It can be divided in two parts, 22 and 113504, that added together give a triangular number (113526 = T₄₇₆).

The spelling of 22113504 in words is "twenty-two million, one hundred thirteen thousand, five hundred four".