18780020236 has 24 divisors (see below), whose sum is σ = 32936173200. Its totient is φ = 9369709632.

The previous prime is 18780020227. The next prime is 18780020263. The reversal of 18780020236 is 63202008781.

It is a junction number, because it is equal to n+sod(n) for n = 18780020195 and 18780020204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4936311 + ... + 4940113.

It is an arithmetic number, because the mean of its divisors is an integer number (1372340550).

Almost surely, 2^18780020236 is an apocalyptic number.

It is an amenable number.

18780020236 is a deficient number, since it is larger than the sum of its proper divisors (14156152964).

18780020236 is a wasteful number, since it uses less digits than its factorization.

18780020236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153 (or 6151 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 18780020236 in words is "eighteen billion, seven hundred eighty million, twenty thousand, two hundred thirty-six".