20139704102 has 32 divisors (see below), whose sum is σ = 34635009024. Its totient is φ = 8603899200.

The previous prime is 20139704059. The next prime is 20139704129. The reversal of 20139704102 is 20140793102.

It is a super-2 number, since 2×20139704102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8977793 + ... + 8980035.

It is an arithmetic number, because the mean of its divisors is an integer number (1082344032).

Almost surely, 2^20139704102 is an apocalyptic number.

20139704102 is a deficient number, since it is larger than the sum of its proper divisors (14495304922).

20139704102 is a wasteful number, since it uses less digits than its factorization.

20139704102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 20139704102 in words is "twenty billion, one hundred thirty-nine million, seven hundred four thousand, one hundred two".