20131120104 has 32 divisors (see below), whose sum is σ = 50816425920. Its totient is φ = 6645223296.

The previous prime is 20131120049. The next prime is 20131120111. The reversal of 20131120104 is 40102113102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4069357 + ... + 4074300.

It is an arithmetic number, because the mean of its divisors is an integer number (1588013310).

Almost surely, 2^20131120104 is an apocalyptic number.

20131120104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20131120104 is an abundant number, since it is smaller than the sum of its proper divisors (30685305816).

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

20131120104 is a wasteful number, since it uses less digits than its factorization.

20131120104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8143769 (or 8143765 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20131120104 its reverse (40102113102), we get a palindrome (60233233206).

The spelling of 20131120104 in words is "twenty billion, one hundred thirty-one million, one hundred twenty thousand, one hundred four".