18939153 has 16 divisors (see below), whose sum is σ = 26216960. Its totient is φ = 12151296.

The previous prime is 18939131. The next prime is 18939157. The reversal of 18939153 is 35193981.

It is not a de Polignac number, because 18939153 - 2⁵ = 18939121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18939157) 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 15 ways as a sum of consecutive naturals, for example, 9888 + ... + 11646.

It is an arithmetic number, because the mean of its divisors is an integer number (1638560).

Almost surely, 2^18939153 is an apocalyptic number.

It is an amenable number.

18939153 is a deficient number, since it is larger than the sum of its proper divisors (7277807).

18939153 is a wasteful number, since it uses less digits than its factorization.

18939153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

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

The square root of 18939153 is about 4351.9137169756. The cubic root of 18939153 is about 266.5550107204. Note that the first 3 decimals are identical.

The spelling of 18939153 in words is "eighteen million, nine hundred thirty-nine thousand, one hundred fifty-three".