20160977790 has 32 divisors (see below), whose sum is σ = 51232603680. Its totient is φ = 5060009984.

The previous prime is 20160977789. The next prime is 20160977797. The reversal of 20160977790 is 9777906102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20160977797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19765155 + ... + 19766174.

It is an arithmetic number, because the mean of its divisors is an integer number (1601018865).

Almost surely, 2^20160977790 is an apocalyptic number.

20160977790 is an abundant number, since it is smaller than the sum of its proper divisors (31071625890).

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

20160977790 is a wasteful number, since it uses less digits than its factorization.

20160977790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39531356.

The product of its (nonzero) digits is 333396, while the sum is 48.

The spelling of 20160977790 in words is "twenty billion, one hundred sixty million, nine hundred seventy-seven thousand, seven hundred ninety".