20139892672 has 28 divisors (see below), whose sum is σ = 40338618840. Its totient is φ = 9975831296.

The previous prime is 20139892649. The next prime is 20139892679. The reversal of 20139892672 is 27629893102.

It is a super-3 number, since 3×20139892672³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20139892679) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1463647 + ... + 1477342.

Almost surely, 2^20139892672 is an apocalyptic number.

It is an amenable number.

20139892672 is an abundant number, since it is smaller than the sum of its proper divisors (20198726168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20139892672 is a wasteful number, since it uses less digits than its factorization.

20139892672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941108 (or 2941098 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 20139892672 in words is "twenty billion, one hundred thirty-nine million, eight hundred ninety-two thousand, six hundred seventy-two".