18972833 has 16 divisors (see below), whose sum is σ = 22239360. Its totient is φ = 15993600.

The previous prime is 18972829. The next prime is 18972841. The reversal of 18972833 is 33827981.

It is not a de Polignac number, because 18972833 - 2² = 18972829 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18972853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12563 + ... + 13991.

It is an arithmetic number, because the mean of its divisors is an integer number (1389960).

Almost surely, 2^18972833 is an apocalyptic number.

It is an amenable number.

18972833 is a deficient number, since it is larger than the sum of its proper divisors (3266527).

18972833 is a wasteful number, since it uses less digits than its factorization.

18972833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its digits is 72576, while the sum is 41.

The square root of 18972833 is about 4355.7815601795. The cubic root of 18972833 is about 266.7129244406.

The spelling of 18972833 in words is "eighteen million, nine hundred seventy-two thousand, eight hundred thirty-three".