18785016 has 48 divisors (see below), whose sum is σ = 51269400. Its totient is φ = 6213312.

The previous prime is 18785009. The next prime is 18785021. The reversal of 18785016 is 61058781.

It is a super-2 number, since 2×18785016² = 705753652240512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 9070 + ... + 10946.

Almost surely, 2^18785016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18785016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25634700).

18785016 is an abundant number, since it is smaller than the sum of its proper divisors (32484384).

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

18785016 is a wasteful number, since it uses less digits than its factorization.

18785016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 18785016 is about 4334.1684323524. The cubic root of 18785016 is about 265.8299174643.

The spelling of 18785016 in words is "eighteen million, seven hundred eighty-five thousand, sixteen".