22113810 has 80 divisors (see below), whose sum is σ = 62099136. Its totient is φ = 5635872.

The previous prime is 22113803. The next prime is 22113823. The reversal of 22113810 is 1831122.

It is a super-2 number, since 2×22113810² = 978041185432200, which contains 22 as substring.

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

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 18037 + ... + 19223.

Almost surely, 2^22113810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22113810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31049568).

22113810 is an abundant number, since it is smaller than the sum of its proper divisors (39985326).

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

22113810 is a wasteful number, since it uses less digits than its factorization.

22113810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 22113810 is about 4702.5322965398. The cubic root of 22113810 is about 280.6862842198.

Adding to 22113810 its reverse (1831122), we get a palindrome (23944932).

The spelling of 22113810 in words is "twenty-two million, one hundred thirteen thousand, eight hundred ten".