23515502013 has 32 divisors (see below), whose sum is σ = 36948468480. Its totient is φ = 14749542720.

The previous prime is 23515501979. The next prime is 23515502027. The reversal of 23515502013 is 31020551532.

It is a happy number.

It is not a de Polignac number, because 23515502013 - 2¹³ = 23515493821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23515502083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272506 + ... + 348267.

It is an arithmetic number, because the mean of its divisors is an integer number (1154639640).

Almost surely, 2^23515502013 is an apocalyptic number.

23515502013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23515502013 is a deficient number, since it is larger than the sum of its proper divisors (13432966467).

23515502013 is a wasteful number, since it uses less digits than its factorization.

23515502013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620866 (or 620860 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 23515502013 in words is "twenty-three billion, five hundred fifteen million, five hundred two thousand, thirteen".