20139104112 has 60 divisors (see below), whose sum is σ = 54908394120. Its totient is φ = 6359711616.

The previous prime is 20139104053. The next prime is 20139104123. The reversal of 20139104112 is 21140193102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563787 + ... + 598442.

It is an arithmetic number, because the mean of its divisors is an integer number (915139902).

Almost surely, 2^20139104112 is an apocalyptic number.

It is an amenable number.

20139104112 is an abundant number, since it is smaller than the sum of its proper divisors (34769290008).

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

20139104112 is a wasteful number, since it uses less digits than its factorization.

20139104112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162278 (or 1162253 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 20139104112 its reverse (21140193102), we get a palindrome (41279297214).

It can be divided in two parts, 20139 and 104112, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 20139104112 in words is "twenty billion, one hundred thirty-nine million, one hundred four thousand, one hundred twelve".