20740790205 has 16 divisors (see below), whose sum is σ = 36872516160. Its totient is φ = 11061754704.

The previous prime is 20740790167. The next prime is 20740790221. The reversal of 20740790205 is 50209704702.

It is not a de Polignac number, because 20740790205 - 2⁶ = 20740790141 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20740790205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76817607 + ... + 76817876.

It is an arithmetic number, because the mean of its divisors is an integer number (2304532260).

Almost surely, 2^20740790205 is an apocalyptic number.

It is an amenable number.

20740790205 is a deficient number, since it is larger than the sum of its proper divisors (16131725955).

20740790205 is a wasteful number, since it uses less digits than its factorization.

20740790205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153635497 (or 153635491 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 20740790205 in words is "twenty billion, seven hundred forty million, seven hundred ninety thousand, two hundred five".