18690049 has 8 divisors (see below), whose sum is σ = 21394880. Its totient is φ = 15993936.

The previous prime is 18690047. The next prime is 18690059. The reversal of 18690049 is 94009681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18690049 - 2¹ = 18690047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18690041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3367 + ... + 6979.

It is an arithmetic number, because the mean of its divisors is an integer number (2674360).

Almost surely, 2^18690049 is an apocalyptic number.

It is an amenable number.

18690049 is a deficient number, since it is larger than the sum of its proper divisors (2704831).

18690049 is an equidigital number, since it uses as much as digits as its factorization.

18690049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 18690049 is about 4323.1989313470. The cubic root of 18690049 is about 265.3811957896.

The spelling of 18690049 in words is "eighteen million, six hundred ninety thousand, forty-nine".