18363490 has 16 divisors (see below), whose sum is σ = 33861240. Its totient is φ = 7166080.

The previous prime is 18363479. The next prime is 18363529. The reversal of 18363490 is 9436381.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 13242321 = 2263^2 + 3639^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21985 + ... + 22804.

Almost surely, 2^18363490 is an apocalyptic number.

18363490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18363490 is a deficient number, since it is larger than the sum of its proper divisors (15497750).

18363490 is a wasteful number, since it uses less digits than its factorization.

18363490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44837.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 18363490 is about 4285.2642858988. The cubic root of 18363490 is about 263.8264948865.

The spelling of 18363490 in words is "eighteen million, three hundred sixty-three thousand, four hundred ninety".