18420594 has 16 divisors (see below), whose sum is σ = 36996960. Its totient is φ = 6114240.

The previous prime is 18420587. The next prime is 18420607. The reversal of 18420594 is 49502481.

It is a super-3 number, since 3×18420594³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4924 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (2312310).

Almost surely, 2^18420594 is an apocalyptic number.

18420594 is an abundant number, since it is smaller than the sum of its proper divisors (18576366).

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

18420594 is a wasteful number, since it uses less digits than its factorization.

18420594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12985.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18420594 is about 4291.9219471002. The cubic root of 18420594 is about 264.0996811363.

The spelling of 18420594 in words is "eighteen million, four hundred twenty thousand, five hundred ninety-four".