20103999980 has 24 divisors (see below), whose sum is σ = 42796737312. Its totient is φ = 7931440512.

The previous prime is 20103999973. The next prime is 20103999989. The reversal of 20103999980 is 8999930102.

It is not an unprimeable number, because it can be changed into a prime (20103999989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6883472 + ... + 6886391.

It is an arithmetic number, because the mean of its divisors is an integer number (1783197388).

Almost surely, 2^20103999980 is an apocalyptic number.

20103999980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20103999980 is an abundant number, since it is smaller than the sum of its proper divisors (22692737332).

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

20103999980 is a wasteful number, since it uses less digits than its factorization.

20103999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13769945 (or 13769943 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 50.

The spelling of 20103999980 in words is "twenty billion, one hundred three million, nine hundred ninety-nine thousand, nine hundred eighty".