1901939020 has 24 divisors (see below), whose sum is σ = 4086959184. Its totient is φ = 743082816.

The previous prime is 1901938967. The next prime is 1901939021. The reversal of 1901939020 is 209391091.

It is not an unprimeable number, because it can be changed into a prime (1901939021) 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, 1104919 + ... + 1106638.

It is an arithmetic number, because the mean of its divisors is an integer number (170289966).

Almost surely, 2^1901939020 is an apocalyptic number.

1901939020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901939020 is an abundant number, since it is smaller than the sum of its proper divisors (2185020164).

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

1901939020 is a wasteful number, since it uses less digits than its factorization.

1901939020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211609 (or 2211607 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 1901939020 is about 43611.2258483983. The cubic root of 1901939020 is about 1238.9835192124.

The spelling of 1901939020 in words is "one billion, nine hundred one million, nine hundred thirty-nine thousand, twenty".