23381521136 has 20 divisors (see below), whose sum is σ = 45304317600. Its totient is φ = 11690084352.

The previous prime is 23381521133. The next prime is 23381521147. The reversal of 23381521136 is 63112518332.

It is a junction number, because it is equal to n+sod(n) for n = 23381521096 and 23381521105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381521133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357680 + ... + 417968.

It is an arithmetic number, because the mean of its divisors is an integer number (2265215880).

Almost surely, 2^23381521136 is an apocalyptic number.

It is an amenable number.

23381521136 is a deficient number, since it is larger than the sum of its proper divisors (21922796464).

23381521136 is a wasteful number, since it uses less digits than its factorization.

23381521136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84536 (or 84530 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The spelling of 23381521136 in words is "twenty-three billion, three hundred eighty-one million, five hundred twenty-one thousand, one hundred thirty-six".