18985086 has 24 divisors (see below), whose sum is σ = 42011424. Its totient is φ = 6193440.

The previous prime is 18985081. The next prime is 18985093. The reversal of 18985086 is 68058981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18985081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10375 + ... + 12066.

It is an arithmetic number, because the mean of its divisors is an integer number (1750476).

Almost surely, 2^18985086 is an apocalyptic number.

18985086 is an abundant number, since it is smaller than the sum of its proper divisors (23026338).

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

18985086 is a wasteful number, since it uses less digits than its factorization.

18985086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22496 (or 22493 counting only the distinct ones).

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

The square root of 18985086 is about 4357.1878545686. The cubic root of 18985086 is about 266.7703281012.

The spelling of 18985086 in words is "eighteen million, nine hundred eighty-five thousand, eighty-six".