18494402 has 16 divisors (see below), whose sum is σ = 30387960. Its totient is φ = 8402688.

The previous prime is 18494401. The next prime is 18494501. The reversal of 18494402 is 20449481.

It can be written as a sum of positive squares in 4 ways, for example, as 17884441 + 609961 = 4229^2 + 781^2 .

It is not an unprimeable number, because it can be changed into a prime (18494401) 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 in 7 ways as a sum of consecutive naturals, for example, 8393 + ... + 10364.

Almost surely, 2^18494402 is an apocalyptic number.

18494402 is a deficient number, since it is larger than the sum of its proper divisors (11893558).

18494402 is a wasteful number, since it uses less digits than its factorization.

18494402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18805.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18494402 is about 4300.5118300035. The cubic root of 18494402 is about 264.4519443429.

The spelling of 18494402 in words is "eighteen million, four hundred ninety-four thousand, four hundred two".