18940768120 has 32 divisors (see below), whose sum is σ = 43991464320. Its totient is φ = 7331909760.

The previous prime is 18940768109. The next prime is 18940768123. The reversal of 18940768120 is 2186704981.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940768123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7636167 + ... + 7638646.

It is an arithmetic number, because the mean of its divisors is an integer number (1374733260).

Almost surely, 2^18940768120 is an apocalyptic number.

18940768120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18940768120 is an abundant number, since it is smaller than the sum of its proper divisors (25050696200).

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

18940768120 is a wasteful number, since it uses less digits than its factorization.

18940768120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15274855 (or 15274851 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 18940768120 in words is "eighteen billion, nine hundred forty million, seven hundred sixty-eight thousand, one hundred twenty".