18136354 has 4 divisors (see below), whose sum is σ = 27204534. Its totient is φ = 9068176.

The previous prime is 18136319. The next prime is 18136357. The reversal of 18136354 is 45363181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45363181 = 431 ⋅105251.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 31329 = 4255^2 + 177^2 .

It is not an unprimeable number, because it can be changed into a prime (18136357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4534087 + ... + 4534090.

Almost surely, 2^18136354 is an apocalyptic number.

18136354 is a deficient number, since it is larger than the sum of its proper divisors (9068180).

18136354 is an equidigital number, since it uses as much as digits as its factorization.

18136354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068179.

The product of its digits is 8640, while the sum is 31.

The square root of 18136354 is about 4258.6798423925. The cubic root of 18136354 is about 262.7342320483.

The spelling of 18136354 in words is "eighteen million, one hundred thirty-six thousand, three hundred fifty-four".