20747207164 has 6 divisors (see below), whose sum is σ = 36307612544. Its totient is φ = 10373603580.

The previous prime is 20747207153. The next prime is 20747207171. The reversal of 20747207164 is 46170274702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2593400892 + ... + 2593400899.

Almost surely, 2^20747207164 is an apocalyptic number.

It is an amenable number.

20747207164 is a deficient number, since it is larger than the sum of its proper divisors (15560405380).

20747207164 is a wasteful number, since it uses less digits than its factorization.

20747207164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186801795 (or 5186801793 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 20747207164 in words is "twenty billion, seven hundred forty-seven million, two hundred seven thousand, one hundred sixty-four".