20299078764 has 24 divisors (see below), whose sum is σ = 52627241520. Its totient is φ = 6766359552.

The previous prime is 20299078759. The next prime is 20299078777. The reversal of 20299078764 is 46787099202.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 20299078764.

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, 93977109 + ... + 93977324.

It is an arithmetic number, because the mean of its divisors is an integer number (2192801730).

Almost surely, 2^20299078764 is an apocalyptic number.

It is an amenable number.

20299078764 is an abundant number, since it is smaller than the sum of its proper divisors (32328162756).

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

20299078764 is a wasteful number, since it uses less digits than its factorization.

20299078764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187954446 (or 187954438 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 20299078764 in words is "twenty billion, two hundred ninety-nine million, seventy-eight thousand, seven hundred sixty-four".