18953319 has 24 divisors (see below), whose sum is σ = 31749760. Its totient is φ = 9844560.

The previous prime is 18953309. The next prime is 18953323. The reversal of 18953319 is 91335981.

It is not a de Polignac number, because 18953319 - 2⁴ = 18953303 is a prime.

It is a super-2 number, since 2×18953319² = 718456602231522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18953309) 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 23 ways as a sum of consecutive naturals, for example, 1189 + ... + 6270.

Almost surely, 2^18953319 is an apocalyptic number.

18953319 is a deficient number, since it is larger than the sum of its proper divisors (12796441).

18953319 is a wasteful number, since it uses less digits than its factorization.

18953319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491 (or 7480 counting only the distinct ones).

The product of its digits is 29160, while the sum is 39.

The square root of 18953319 is about 4353.5409725877. The cubic root of 18953319 is about 266.6214529247.

The spelling of 18953319 in words is "eighteen million, nine hundred fifty-three thousand, three hundred nineteen".