18364380 has 48 divisors (see below), whose sum is σ = 51626400. Its totient is φ = 4877568.

The previous prime is 18364343. The next prime is 18364387. The reversal of 18364380 is 8346381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364387) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20502 + ... + 21378.

It is an arithmetic number, because the mean of its divisors is an integer number (1075550).

Almost surely, 2^18364380 is an apocalyptic number.

18364380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18364380 is an abundant number, since it is smaller than the sum of its proper divisors (33262020).

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

18364380 is a wasteful number, since it uses less digits than its factorization.

18364380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18364380 is about 4285.3681288776. The cubic root of 18364380 is about 263.8307569992.

It can be divided in two parts, 1836 and 4380, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 18364380 in words is "eighteen million, three hundred sixty-four thousand, three hundred eighty".