18220039290 has 32 divisors (see below), whose sum is σ = 48586772160. Its totient is φ = 4858677072.

The previous prime is 18220039261. The next prime is 18220039333. The reversal of 18220039290 is 9293002281.

18220039290 is a `hidden beast` number, since 182 + 2 + 0 + 0 + 392 + 90 = 666.

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, 33740544 + ... + 33741083.

It is an arithmetic number, because the mean of its divisors is an integer number (1518336630).

Almost surely, 2^18220039290 is an apocalyptic number.

18220039290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18220039290 is an abundant number, since it is smaller than the sum of its proper divisors (30366732870).

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

18220039290 is a wasteful number, since it uses less digits than its factorization.

18220039290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67481643 (or 67481637 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 18220039290 in words is "eighteen billion, two hundred twenty million, thirty-nine thousand, two hundred ninety".