18402164 has 36 divisors (see below), whose sum is σ = 35761572. Its totient is φ = 8279040.

The previous prime is 18402157. The next prime is 18402169. The reversal of 18402164 is 46120481.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 5856400 = 3542^2 + 2420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18402169) 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, 93314 + ... + 93510.

It is an arithmetic number, because the mean of its divisors is an integer number (993377).

Almost surely, 2^18402164 is an apocalyptic number.

It is an amenable number.

18402164 is a deficient number, since it is larger than the sum of its proper divisors (17359408).

18402164 is a wasteful number, since it uses less digits than its factorization.

18402164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18402164 is about 4289.7743530400. The cubic root of 18402164 is about 264.0115735667.

It can be divided in two parts, 1840 and 2164, that added together give a palindrome (4004).

The spelling of 18402164 in words is "eighteen million, four hundred two thousand, one hundred sixty-four".