20656042312 has 8 divisors (see below), whose sum is σ = 38730079350. Its totient is φ = 10328021152.

The previous prime is 20656042301. The next prime is 20656042369. The reversal of 20656042312 is 21324065602.

It can be written as a sum of positive squares in only one way, i.e., 18356456196 + 2299586116 = 135486^2 + 47954^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1291002637 + ... + 1291002652.

Almost surely, 2^20656042312 is an apocalyptic number.

It is an amenable number.

20656042312 is a deficient number, since it is larger than the sum of its proper divisors (18074037038).

20656042312 is a wasteful number, since it uses less digits than its factorization.

20656042312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582005295 (or 2582005291 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20656042312 in words is "twenty billion, six hundred fifty-six million, forty-two thousand, three hundred twelve".