22153812 has 24 divisors (see below), whose sum is σ = 52348800. Its totient is φ = 7290816.

The previous prime is 22153811. The next prime is 22153823. The reversal of 22153812 is 21835122.

It is a super-2 number, since 2×22153812² = 981582772262688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22153811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10737 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (2181200).

Almost surely, 2^22153812 is an apocalyptic number.

It is an amenable number.

22153812 is an abundant number, since it is smaller than the sum of its proper divisors (30194988).

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

22153812 is a wasteful number, since it uses less digits than its factorization.

22153812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23455 (or 23453 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 22153812 is about 4706.7836151665. The cubic root of 22153812 is about 280.8554281373.

Adding to 22153812 its reverse (21835122), we get a palindrome (43988934).

The spelling of 22153812 in words is "twenty-two million, one hundred fifty-three thousand, eight hundred twelve".