20356641044 has 6 divisors (see below), whose sum is σ = 35624121834. Its totient is φ = 10178320520.

The previous prime is 20356641029. The next prime is 20356641101. The reversal of 20356641044 is 44014665302.

It can be written as a sum of positive squares in only one way, i.e., 20231648644 + 124992400 = 142238^2 + 11180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20356640995 and 20356641013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2544580127 + ... + 2544580134.

It is an arithmetic number, because the mean of its divisors is an integer number (5937353639).

Almost surely, 2^20356641044 is an apocalyptic number.

It is an amenable number.

20356641044 is a deficient number, since it is larger than the sum of its proper divisors (15267480790).

20356641044 is a wasteful number, since it uses less digits than its factorization.

20356641044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089160265 (or 5089160263 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20356641044 in words is "twenty billion, three hundred fifty-six million, six hundred forty-one thousand, forty-four".