13997979900 has 144 divisors (see below), whose sum is σ = 45170546400. Its totient is φ = 3718725120.

The previous prime is 13997979899. The next prime is 13997979917. The reversal of 13997979900 is 997979931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 716664 + ... + 735936.

It is an arithmetic number, because the mean of its divisors is an integer number (313684350).

Almost surely, 2^13997979900 is an apocalyptic number.

13997979900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13997979900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22585273200).

13997979900 is an abundant number, since it is smaller than the sum of its proper divisors (31172566500).

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

13997979900 is a wasteful number, since it uses less digits than its factorization.

13997979900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19565 (or 19552 counting only the distinct ones).

The product of its (nonzero) digits is 8680203, while the sum is 63.

The spelling of 13997979900 in words is "thirteen billion, nine hundred ninety-seven million, nine hundred seventy-nine thousand, nine hundred".