20396177192 has 8 divisors (see below), whose sum is σ = 38242832250. Its totient is φ = 10198088592.

The previous prime is 20396177189. The next prime is 20396177203. The reversal of 20396177192 is 29177169302.

It can be written as a sum of positive squares in only one way, i.e., 13265050276 + 7131126916 = 115174^2 + 84446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20396177192² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274761067 + ... + 1274761082.

Almost surely, 2^20396177192 is an apocalyptic number.

It is an amenable number.

20396177192 is a deficient number, since it is larger than the sum of its proper divisors (17846655058).

20396177192 is a wasteful number, since it uses less digits than its factorization.

20396177192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549522155 (or 2549522151 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 20396177192 in words is "twenty billion, three hundred ninety-six million, one hundred seventy-seven thousand, one hundred ninety-two".