18680490 has 64 divisors (see below), whose sum is σ = 51004800. Its totient is φ = 4862592.

The previous prime is 18680443. The next prime is 18680503. The reversal of 18680490 is 9408681.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10806 + ... + 12414.

It is an arithmetic number, because the mean of its divisors is an integer number (796950).

Almost surely, 2^18680490 is an apocalyptic number.

18680490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18680490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25502400).

18680490 is an abundant number, since it is smaller than the sum of its proper divisors (32324310).

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

18680490 is a wasteful number, since it uses less digits than its factorization.

18680490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18680490 is about 4322.0932428628. The cubic root of 18680490 is about 265.3359451244.

The spelling of 18680490 in words is "eighteen million, six hundred eighty thousand, four hundred ninety".