20368640724036 has 96 divisors (see below), whose sum is σ = 54984303360000. Its totient is φ = 5800031193600.

The previous prime is 20368640724017. The next prime is 20368640724041. The reversal of 20368640724036 is 63042704686302.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 20368640724036.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5776536 + ... + 8608463.

It is an arithmetic number, because the mean of its divisors is an integer number (572753160000).

Almost surely, 2^{20368640724036} is an apocalyptic number.

It is an amenable number.

20368640724036 is an abundant number, since it is smaller than the sum of its proper divisors (34615662635964).

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

20368640724036 is a wasteful number, since it uses less digits than its factorization.

20368640724036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14385665 (or 14385663 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 51.

The spelling of 20368640724036 in words is "twenty trillion, three hundred sixty-eight billion, six hundred forty million, seven hundred twenty-four thousand, thirty-six".