17920994 has 16 divisors (see below), whose sum is σ = 33085248. Its totient is φ = 7089552.

The previous prime is 17920993. The next prime is 17920997. The reversal of 17920994 is 49902971.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17920993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49052 + ... + 49415.

It is an arithmetic number, because the mean of its divisors is an integer number (2067828).

Almost surely, 2^17920994 is an apocalyptic number.

17920994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

17920994 is a deficient number, since it is larger than the sum of its proper divisors (15164254).

17920994 is a wasteful number, since it uses less digits than its factorization.

17920994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98489.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 17920994 is about 4233.3195012897. The cubic root of 17920994 is about 261.6901431779.

The spelling of 17920994 in words is "seventeen million, nine hundred twenty thousand, nine hundred ninety-four".