23809505505920 has 64 divisors (see below), whose sum is σ = 57122160382440. Its totient is φ = 9489909596160.

The previous prime is 23809505505911. The next prime is 23809505505997. The reversal of 23809505505920 is 2950550590832.

It can be written as a sum of positive squares in 4 ways, for example, as 20332235320384 + 3477270185536 = 4509128^2 + 1864744^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66016517 + ... + 66376196.

Almost surely, 2^{23809505505920} is an apocalyptic number.

23809505505920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23809505505920 is an abundant number, since it is smaller than the sum of its proper divisors (33312654876520).

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

23809505505920 is a wasteful number, since it uses less digits than its factorization.

23809505505920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132393013 (or 132393001 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 23809505505920 in words is "twenty-three trillion, eight hundred nine billion, five hundred five million, five hundred five thousand, nine hundred twenty".