18536380 has 12 divisors (see below), whose sum is σ = 38926440. Its totient is φ = 7414544.

The previous prime is 18536363. The next prime is 18536389. The reversal of 18536380 is 8363581.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463390 + ... + 463429.

It is an arithmetic number, because the mean of its divisors is an integer number (3243870).

Almost surely, 2^18536380 is an apocalyptic number.

18536380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18536380 is an abundant number, since it is smaller than the sum of its proper divisors (20390060).

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

18536380 is a wasteful number, since it uses less digits than its factorization.

18536380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926828 (or 926826 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18536380 is about 4305.3896455489. The cubic root of 18536380 is about 264.6518746655.

The spelling of 18536380 in words is "eighteen million, five hundred thirty-six thousand, three hundred eighty".