18064994 has 4 divisors (see below), whose sum is σ = 27097494. Its totient is φ = 9032496.

The previous prime is 18064973. The next prime is 18065023. The reversal of 18064994 is 49946081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49946081 = 2081 ⋅24001.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 214369 = 4225^2 + 463^2 .

It is an unprimeable number.

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, 4516247 + ... + 4516250.

Almost surely, 2^18064994 is an apocalyptic number.

18064994 is a deficient number, since it is larger than the sum of its proper divisors (9032500).

18064994 is an equidigital number, since it uses as much as digits as its factorization.

18064994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032499.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 18064994 is about 4250.2934016371. The cubic root of 18064994 is about 262.3891910237.

The spelling of 18064994 in words is "eighteen million, sixty-four thousand, nine hundred ninety-four".