20320664762 has 16 divisors (see below), whose sum is σ = 31616636040. Its totient is φ = 9783665472.

The previous prime is 20320664759. The next prime is 20320664807. The reversal of 20320664762 is 26746602302.

It can be written as a sum of positive squares in 4 ways, for example, as 16622687041 + 3697977721 = 128929^2 + 60811^2 .

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, 448013 + ... + 491280.

Almost surely, 2^20320664762 is an apocalyptic number.

20320664762 is a deficient number, since it is larger than the sum of its proper divisors (11295971278).

20320664762 is a wasteful number, since it uses less digits than its factorization.

20320664762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939697.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 20320664762 in words is "twenty billion, three hundred twenty million, six hundred sixty-four thousand, seven hundred sixty-two".