18140492 has 6 divisors (see below), whose sum is σ = 31745868. Its totient is φ = 9070244.

The previous prime is 18140489. The next prime is 18140501. The reversal of 18140492 is 29404181.

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, 2267558 + ... + 2267565.

It is an arithmetic number, because the mean of its divisors is an integer number (5290978).

Almost surely, 2^18140492 is an apocalyptic number.

It is an amenable number.

18140492 is a deficient number, since it is larger than the sum of its proper divisors (13605376).

18140492 is a wasteful number, since it uses less digits than its factorization.

18140492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535127 (or 4535125 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18140492 is about 4259.1656459922. The cubic root of 18140492 is about 262.7542123887.

The spelling of 18140492 in words is "eighteen million, one hundred forty thousand, four hundred ninety-two".