18488016 has 30 divisors (see below), whose sum is σ = 51741170. Its totient is φ = 6162624.

The previous prime is 18488011. The next prime is 18488023. The reversal of 18488016 is 61088481.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 32400 = 4296^2 + 180^2 .

It is a super-3 number, since 3×18488016³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18488011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64051 + ... + 64338.

Almost surely, 2^18488016 is an apocalyptic number.

18488016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18488016 is an abundant number, since it is smaller than the sum of its proper divisors (33253154).

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

18488016 is a wasteful number, since it uses less digits than its factorization.

18488016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128403 (or 128394 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18488016 is about 4299.7692961367. The cubic root of 18488016 is about 264.4215029778.

The spelling of 18488016 in words is "eighteen million, four hundred eighty-eight thousand, sixteen".