21523108232 has 16 divisors (see below), whose sum is σ = 40866662400. Its totient is φ = 10625331600.

The previous prime is 21523108127. The next prime is 21523108237. The reversal of 21523108232 is 23280132512.

It is a junction number, because it is equal to n+sod(n) for n = 21523108195 and 21523108204.

It is not an unprimeable number, because it can be changed into a prime (21523108237) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17027144 + ... + 17028407.

It is an arithmetic number, because the mean of its divisors is an integer number (2554166400).

Almost surely, 2^21523108232 is an apocalyptic number.

It is an amenable number.

21523108232 is a deficient number, since it is larger than the sum of its proper divisors (19343554168).

21523108232 is a wasteful number, since it uses less digits than its factorization.

21523108232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34055636 (or 34055632 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21523108232 in words is "twenty-one billion, five hundred twenty-three million, one hundred eight thousand, two hundred thirty-two".