17920494 has 32 divisors (see below), whose sum is σ = 39998880. Its totient is φ = 5947200.

The previous prime is 17920433. The next prime is 17920517. The reversal of 17920494 is 49402971.

It is a super-2 number, since 2×17920494² = 642288210408072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14584 + ... + 15764.

It is an arithmetic number, because the mean of its divisors is an integer number (1249965).

Almost surely, 2^17920494 is an apocalyptic number.

17920494 is an abundant number, since it is smaller than the sum of its proper divisors (22078386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17920494 is a wasteful number, since it uses less digits than its factorization.

17920494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 17920494 is about 4233.2604455668. The cubic root of 17920494 is about 261.6877094161.

The spelling of 17920494 in words is "seventeen million, nine hundred twenty thousand, four hundred ninety-four".