23999367879540 has 72 divisors (see below), whose sum is σ = 75494307863520. Its totient is φ = 6399831433248.

The previous prime is 23999367879517. The next prime is 23999367879577. The reversal of 23999367879540 is 4597876399932.

23999367879540 is a `hidden beast` number, since 2 + 3 + 9 + 9 + 9 + 3 + 67 + 8 + 7 + 9 + 540 = 666.

It is a super-2 number, since 2×23999367879540² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 23999367879540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2469065910 + ... + 2469075629.

It is an arithmetic number, because the mean of its divisors is an integer number (1048532053660).

Almost surely, 2^{23999367879540} is an apocalyptic number.

23999367879540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23999367879540 is an abundant number, since it is smaller than the sum of its proper divisors (51494939983980).

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

23999367879540 is a wasteful number, since it uses less digits than its factorization.

23999367879540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938141563 (or 4938141549 counting only the distinct ones).

The product of its (nonzero) digits is 5555329920, while the sum is 81.

The spelling of 23999367879540 in words is "twenty-three trillion, nine hundred ninety-nine billion, three hundred sixty-seven million, eight hundred seventy-nine thousand, five hundred forty".