18020492 has 12 divisors (see below), whose sum is σ = 36041040. Its totient is φ = 7723056.

The previous prime is 18020489. The next prime is 18020501. The reversal of 18020492 is 29402081.

18020492 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 321767 + ... + 321822.

It is an arithmetic number, because the mean of its divisors is an integer number (3003420).

Almost surely, 2^18020492 is an apocalyptic number.

It is an amenable number.

18020492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18020492 is a wasteful number, since it uses less digits than its factorization.

18020492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643600 (or 643598 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18020492 is about 4245.0550055329. The cubic root of 18020492 is about 262.1735539871.

The spelling of 18020492 in words is "eighteen million, twenty thousand, four hundred ninety-two".