23881718435640 has 128 divisors (see below), whose sum is σ = 77171531976000. Its totient is φ = 5877417922560.

The previous prime is 23881718435639. The next prime is 23881718435671. The reversal of 23881718435640 is 4653481718832.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6419886 + ... + 9432834.

Almost surely, 2^{23881718435640} is an apocalyptic number.

23881718435640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23881718435640 is an abundant number, since it is smaller than the sum of its proper divisors (53289813540360).

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

23881718435640 is a wasteful number, since it uses less digits than its factorization.

23881718435640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018057 (or 3018053 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 23881718435640 in words is "twenty-three trillion, eight hundred eighty-one billion, seven hundred eighteen million, four hundred thirty-five thousand, six hundred forty".