18940953320 has 64 divisors (see below), whose sum is σ = 45322804800. Its totient is φ = 7103600640.

The previous prime is 18940953293. The next prime is 18940953323. The reversal of 18940953320 is 2335904981.

It is not an unprimeable number, because it can be changed into a prime (18940953323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54746 + ... + 202185.

It is an arithmetic number, because the mean of its divisors is an integer number (708168825).

Almost surely, 2^18940953320 is an apocalyptic number.

18940953320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18940953320 is an abundant number, since it is smaller than the sum of its proper divisors (26381851480).

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

18940953320 is a wasteful number, since it uses less digits than its factorization.

18940953320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257058 (or 257054 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 18940953320 in words is "eighteen billion, nine hundred forty million, nine hundred fifty-three thousand, three hundred twenty".