18320354 has 16 divisors (see below), whose sum is σ = 29772792. Its totient is φ = 8404608.

The previous prime is 18320353. The next prime is 18320363. The reversal of 18320354 is 45302381.

It can be written as a sum of positive squares in 4 ways, for example, as 12924025 + 5396329 = 3595^2 + 2323^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (18320353) 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 7 ways as a sum of consecutive naturals, for example, 2462 + ... + 6534.

Almost surely, 2^18320354 is an apocalyptic number.

18320354 is a deficient number, since it is larger than the sum of its proper divisors (11452438).

18320354 is a wasteful number, since it uses less digits than its factorization.

18320354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 18320354 is about 4280.2282649410. The cubic root of 18320354 is about 263.6197560035.

The spelling of 18320354 in words is "eighteen million, three hundred twenty thousand, three hundred fifty-four".