20747157176 has 32 divisors (see below), whose sum is σ = 40613408640. Its totient is φ = 9917384928.

The previous prime is 20747157163. The next prime is 20747157181. The reversal of 20747157176 is 67175174702.

It is a self number, because there is not a number n which added to its sum of digits gives 20747157176.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 337235 + ... + 393981.

It is an arithmetic number, because the mean of its divisors is an integer number (1269169020).

Almost surely, 2^20747157176 is an apocalyptic number.

It is an amenable number.

20747157176 is a deficient number, since it is larger than the sum of its proper divisors (19866251464).

20747157176 is a wasteful number, since it uses less digits than its factorization.

20747157176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58763 (or 58759 counting only the distinct ones).

The product of its (nonzero) digits is 576240, while the sum is 47.

The spelling of 20747157176 in words is "twenty billion, seven hundred forty-seven million, one hundred fifty-seven thousand, one hundred seventy-six".