18490839 has 8 divisors (see below), whose sum is σ = 24702192. Its totient is φ = 12303360.

The previous prime is 18490807. The next prime is 18490841. The reversal of 18490839 is 93809481.

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

It is not a de Polignac number, because 18490839 - 2⁵ = 18490807 is a prime.

It is a super-2 number, since 2×18490839² = 683822253847842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18490839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074 + ... + 7319.

It is an arithmetic number, because the mean of its divisors is an integer number (3087774).

Almost surely, 2^18490839 is an apocalyptic number.

18490839 is a deficient number, since it is larger than the sum of its proper divisors (6211353).

18490839 is a wasteful number, since it uses less digits than its factorization.

18490839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11937.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 18490839 is about 4300.0975570329. The cubic root of 18490839 is about 264.4349607751.

The spelling of 18490839 in words is "eighteen million, four hundred ninety thousand, eight hundred thirty-nine".