18690053 has 12 divisors (see below), whose sum is σ = 20592288. Its totient is φ = 16929000.

The previous prime is 18690047. The next prime is 18690059. The reversal of 18690053 is 35009681.

It is an interprime number because it is at equal distance from previous prime (18690047) and next prime (18690059).

It is not a de Polignac number, because 18690053 - 2⁴ = 18690037 is a prime.

It is a super-2 number, since 2×18690053² = 698636162285618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18690059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7178 + ... + 9428.

It is an arithmetic number, because the mean of its divisors is an integer number (1716024).

Almost surely, 2^18690053 is an apocalyptic number.

It is an amenable number.

18690053 is a deficient number, since it is larger than the sum of its proper divisors (1902235).

18690053 is a wasteful number, since it uses less digits than its factorization.

18690053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 18690053 is about 4323.1993939674. The cubic root of 18690053 is about 265.3812147217.

The spelling of 18690053 in words is "eighteen million, six hundred ninety thousand, fifty-three".