20139031125 has 36 divisors (see below), whose sum is σ = 36312542604. Its totient is φ = 10738278000.

The previous prime is 20139031091. The next prime is 20139031139. The reversal of 20139031125 is 52113093102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 644448996 + 19494582129 = 25386^2 + 139623^2 .

It is not a de Polignac number, because 20139031125 - 2⁶ = 20139031061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4757760 + ... + 4761990.

It is an arithmetic number, because the mean of its divisors is an integer number (1008681739).

Almost surely, 2^20139031125 is an apocalyptic number.

20139031125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20139031125 is a deficient number, since it is larger than the sum of its proper divisors (16173511479).

20139031125 is an frugal number, since it uses more digits than its factorization.

20139031125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Multiplying 20139031125 by its product of nonzero digits (1620), we get a square (32625230422500 = 5711850²).

It can be divided in two parts, 2013903 and 1125, that added together give a triangular number (2015028 = T₂₀₀₇).

The spelling of 20139031125 in words is "twenty billion, one hundred thirty-nine million, thirty-one thousand, one hundred twenty-five".