23311695640 has 32 divisors (see below), whose sum is σ = 52479252000. Its totient is φ = 9319711744.

The previous prime is 23311695569. The next prime is 23311695661. The reversal of 23311695640 is 4659611332.

It is a super-2 number, since 2×23311695640² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 23311695593 and 23311695602.

It is a congruent number.

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, 78700 + ... + 229819.

It is an arithmetic number, because the mean of its divisors is an integer number (1639976625).

Almost surely, 2^23311695640 is an apocalyptic number.

23311695640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311695640 is an abundant number, since it is smaller than the sum of its proper divisors (29167556360).

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

23311695640 is a wasteful number, since it uses less digits than its factorization.

23311695640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310419 (or 310415 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 23311695640 in words is "twenty-three billion, three hundred eleven million, six hundred ninety-five thousand, six hundred forty".