18019066820 has 24 divisors (see below), whose sum is σ = 39060688128. Its totient is φ = 6975122400.

The previous prime is 18019066781. The next prime is 18019066837. The reversal of 18019066820 is 2866091081.

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, 14530886 + ... + 14532125.

It is an arithmetic number, because the mean of its divisors is an integer number (1627528672).

Almost surely, 2^18019066820 is an apocalyptic number.

18019066820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18019066820 is an abundant number, since it is smaller than the sum of its proper divisors (21041621308).

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

18019066820 is a wasteful number, since it uses less digits than its factorization.

18019066820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29063051 (or 29063049 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 18019066820 in words is "eighteen billion, nineteen million, sixty-six thousand, eight hundred twenty".