18980586 has 12 divisors (see below), whose sum is σ = 41124642. Its totient is φ = 6326856.

The previous prime is 18980579. The next prime is 18980597. The reversal of 18980586 is 68508981.

It can be written as a sum of positive squares in only one way, i.e., 18533025 + 447561 = 4305^2 + 669^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 527221 + ... + 527256.

Almost surely, 2^18980586 is an apocalyptic number.

18980586 is an abundant number, since it is smaller than the sum of its proper divisors (22144056).

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

18980586 is a wasteful number, since it uses less digits than its factorization.

18980586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054485 (or 1054482 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 18980586 is about 4356.6714358556. The cubic root of 18980586 is about 266.7492490757.

The spelling of 18980586 in words is "eighteen million, nine hundred eighty thousand, five hundred eighty-six".