18764290820 has 48 divisors (see below), whose sum is σ = 42998389056. Its totient is φ = 6821616000.

The previous prime is 18764290801. The next prime is 18764290837. The reversal of 18764290820 is 2809246781.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1093910 + ... + 1110930.

It is an arithmetic number, because the mean of its divisors is an integer number (895799772).

Almost surely, 2^18764290820 is an apocalyptic number.

18764290820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18764290820 is an abundant number, since it is smaller than the sum of its proper divisors (24234098236).

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

18764290820 is a wasteful number, since it uses less digits than its factorization.

18764290820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22052 (or 22050 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 18764290820 in words is "eighteen billion, seven hundred sixty-four million, two hundred ninety thousand, eight hundred twenty".