21624112136 has 16 divisors (see below), whose sum is σ = 44231138640. Its totient is φ = 9829141840.

The previous prime is 21624112123. The next prime is 21624112151. The reversal of 21624112136 is 63121142612.

It is a junction number, because it is equal to n+sod(n) for n = 21624112099 and 21624112108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122864186 + ... + 122864361.

It is an arithmetic number, because the mean of its divisors is an integer number (2764446165).

Almost surely, 2^21624112136 is an apocalyptic number.

It is an amenable number.

21624112136 is an abundant number, since it is smaller than the sum of its proper divisors (22607026504).

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

21624112136 is a wasteful number, since it uses less digits than its factorization.

21624112136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245728564 (or 245728560 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

Adding to 21624112136 its reverse (63121142612), we get a palindrome (84745254748).

The spelling of 21624112136 in words is "twenty-one billion, six hundred twenty-four million, one hundred twelve thousand, one hundred thirty-six".