2031901980 has 24 divisors (see below), whose sum is σ = 5689325712. Its totient is φ = 541840512.

The previous prime is 2031901961. The next prime is 2031901987. The reversal of 2031901980 is 891091302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031901987) 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, 16932457 + ... + 16932576.

It is an arithmetic number, because the mean of its divisors is an integer number (237055238).

Almost surely, 2^2031901980 is an apocalyptic number.

2031901980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031901980 is an abundant number, since it is smaller than the sum of its proper divisors (3657423732).

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

2031901980 is a wasteful number, since it uses less digits than its factorization.

2031901980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33865045 (or 33865043 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 2031901980 is about 45076.6234316636. The cubic root of 2031901980 is about 1266.5847396996.

The spelling of 2031901980 in words is "two billion, thirty-one million, nine hundred one thousand, nine hundred eighty".