18362980 has 12 divisors (see below), whose sum is σ = 38562300. Its totient is φ = 7345184.

The previous prime is 18362977. The next prime is 18363001. The reversal of 18362980 is 8926381.

It can be written as a sum of positive squares in 2 ways, for example, as 11778624 + 6584356 = 3432^2 + 2566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459055 + ... + 459094.

It is an arithmetic number, because the mean of its divisors is an integer number (3213525).

Almost surely, 2^18362980 is an apocalyptic number.

18362980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18362980 is an abundant number, since it is smaller than the sum of its proper divisors (20199320).

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

18362980 is a wasteful number, since it uses less digits than its factorization.

18362980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918158 (or 918156 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18362980 is about 4285.2047792375. The cubic root of 18362980 is about 263.8240524903.

The spelling of 18362980 in words is "eighteen million, three hundred sixty-two thousand, nine hundred eighty".