18930798 has 24 divisors (see below), whose sum is σ = 41581488. Its totient is φ = 6223392.

The previous prime is 18930787. The next prime is 18930803. The reversal of 18930798 is 89703981.

It is a super-2 number, since 2×18930798² = 716750225833608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5890 + ... + 8517.

It is an arithmetic number, because the mean of its divisors is an integer number (1732562).

Almost surely, 2^18930798 is an apocalyptic number.

18930798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18930798 is an abundant number, since it is smaller than the sum of its proper divisors (22650690).

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

18930798 is a wasteful number, since it uses less digits than its factorization.

18930798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14488 (or 14485 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18930798 is about 4350.9536885607. The cubic root of 18930798 is about 266.5158080752.

The spelling of 18930798 in words is "eighteen million, nine hundred thirty thousand, seven hundred ninety-eight".