18941923 has 32 divisors (see below), whose sum is σ = 25804800. Its totient is φ = 13426560.

The previous prime is 18941921. The next prime is 18941933. The reversal of 18941923 is 32914981.

It is not a de Polignac number, because 18941923 - 2¹ = 18941921 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18941921) 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 31 ways as a sum of consecutive naturals, for example, 127053 + ... + 127201.

It is an arithmetic number, because the mean of its divisors is an integer number (806400).

Almost surely, 2^18941923 is an apocalyptic number.

18941923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18941923 is a deficient number, since it is larger than the sum of its proper divisors (6862877).

18941923 is a wasteful number, since it uses less digits than its factorization.

18941923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 15552, while the sum is 37.

The square root of 18941923 is about 4352.2319561347. The cubic root of 18941923 is about 266.5680053421.

The spelling of 18941923 in words is "eighteen million, nine hundred forty-one thousand, nine hundred twenty-three".