18929493 has 24 divisors (see below), whose sum is σ = 29966976. Its totient is φ = 11419200.

The previous prime is 18929479. The next prime is 18929497. The reversal of 18929493 is 39492981.

It is not a de Polignac number, because 18929493 - 2⁹ = 18928981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18929497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36073 + ... + 36593.

It is an arithmetic number, because the mean of its divisors is an integer number (1248624).

Almost surely, 2^18929493 is an apocalyptic number.

It is an amenable number.

18929493 is a deficient number, since it is larger than the sum of its proper divisors (11037483).

18929493 is a wasteful number, since it uses less digits than its factorization.

18929493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 902 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 18929493 is about 4350.8037188547. The cubic root of 18929493 is about 266.5096838199.

The spelling of 18929493 in words is "eighteen million, nine hundred twenty-nine thousand, four hundred ninety-three".