20142931839 has 16 divisors (see below), whose sum is σ = 26917499232. Its totient is φ = 13398522368.

The previous prime is 20142931811. The next prime is 20142931841. The reversal of 20142931839 is 93813924102.

It is a cyclic number.

It is not a de Polignac number, because 20142931839 - 2⁸ = 20142931583 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20142931839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142981839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4871617 + ... + 4875749.

It is an arithmetic number, because the mean of its divisors is an integer number (1682343702).

Almost surely, 2^20142931839 is an apocalyptic number.

20142931839 is a deficient number, since it is larger than the sum of its proper divisors (6774567393).

20142931839 is a wasteful number, since it uses less digits than its factorization.

20142931839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 20142931839 in words is "twenty billion, one hundred forty-two million, nine hundred thirty-one thousand, eight hundred thirty-nine".