18905474 has 40 divisors (see below), whose sum is σ = 34418688. Its totient is φ = 7779240.

The previous prime is 18905473. The next prime is 18905501. The reversal of 18905474 is 47450981.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18905473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 148799 + ... + 148925.

Almost surely, 2^18905474 is an apocalyptic number.

18905474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18905474 is a deficient number, since it is larger than the sum of its proper divisors (15513214).

18905474 is an equidigital number, since it uses as much as digits as its factorization.

18905474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18905474 is about 4348.0425480899. The cubic root of 18905474 is about 266.3969143712.

The spelling of 18905474 in words is "eighteen million, nine hundred five thousand, four hundred seventy-four".