20639976437227 has 24 divisors (see below), whose sum is σ = 24277155689472. Its totient is φ = 17495437050000.

The previous prime is 20639976437189. The next prime is 20639976437287. The reversal of 20639976437227 is 72273467993602.

It is not a de Polignac number, because 20639976437227 - 2²⁷ = 20639842219499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20639976437287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4604649 + ... + 7904602.

It is an arithmetic number, because the mean of its divisors is an integer number (1011548153728).

Almost surely, 2^{20639976437227} is an apocalyptic number.

20639976437227 is a deficient number, since it is larger than the sum of its proper divisors (3637179252245).

20639976437227 is a wasteful number, since it uses less digits than its factorization.

20639976437227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12509639 (or 12509632 counting only the distinct ones).

The product of its (nonzero) digits is 288054144, while the sum is 67.

The spelling of 20639976437227 in words is "twenty trillion, six hundred thirty-nine billion, nine hundred seventy-six million, four hundred thirty-seven thousand, two hundred twenty-seven".