20479764772 has 48 divisors (see below), whose sum is σ = 37635978240. Its totient is φ = 9739585152.

The previous prime is 20479764769. The next prime is 20479764829. The reversal of 20479764772 is 27746797402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9897354 + ... + 9899422.

It is an arithmetic number, because the mean of its divisors is an integer number (784082880).

Almost surely, 2^20479764772 is an apocalyptic number.

It is an amenable number.

20479764772 is a deficient number, since it is larger than the sum of its proper divisors (17156213468).

20479764772 is a wasteful number, since it uses less digits than its factorization.

20479764772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 8297856, while the sum is 55.

The spelling of 20479764772 in words is "twenty billion, four hundred seventy-nine million, seven hundred sixty-four thousand, seven hundred seventy-two".