22153340 has 48 divisors (see below), whose sum is σ = 51305184. Its totient is φ = 7968000.

The previous prime is 22153337. The next prime is 22153357. The reversal of 22153340 is 4335122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21722 + ... + 22718.

It is an arithmetic number, because the mean of its divisors is an integer number (1068858).

Almost surely, 2^22153340 is an apocalyptic number.

22153340 is a gapful number since it is divisible by the number (20) 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 22153340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25652592).

22153340 is an abundant number, since it is smaller than the sum of its proper divisors (29151844).

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

22153340 is a wasteful number, since it uses less digits than its factorization.

22153340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22153340 is about 4706.7334745022. The cubic root of 22153340 is about 280.8534335265.

Adding to 22153340 its reverse (4335122), we get a palindrome (26488462).

It can be divided in two parts, 2215 and 3340, that added together give a palindrome (5555).

The spelling of 22153340 in words is "twenty-two million, one hundred fifty-three thousand, three hundred forty".