20158685868764 has 12 divisors (see below), whose sum is σ = 35279400791544. Its totient is φ = 10078857071184.

The previous prime is 20158685868707. The next prime is 20158685868779. The reversal of 20158685868764 is 46786858685102.

It is a junction number, because it is equal to n+sod(n) for n = 20158685868691 and 20158685868700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121372439 + ... + 121538414.

It is an arithmetic number, because the mean of its divisors is an integer number (2939950065962).

Almost surely, 2^{20158685868764} is an apocalyptic number.

It is an amenable number.

20158685868764 is a deficient number, since it is larger than the sum of its proper divisors (15120714922780).

20158685868764 is a wasteful number, since it uses less digits than its factorization.

20158685868764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242931604 (or 242931602 counting only the distinct ones).

The product of its (nonzero) digits is 1238630400, while the sum is 74.

The spelling of 20158685868764 in words is "twenty trillion, one hundred fifty-eight billion, six hundred eighty-five million, eight hundred sixty-eight thousand, seven hundred sixty-four".