17920940 has 12 divisors (see below), whose sum is σ = 37634016. Its totient is φ = 7168368.

The previous prime is 17920909. The next prime is 17920993. The reversal of 17920940 is 4902971.

It is a junction number, because it is equal to n+sod(n) for n = 17920897 and 17920906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448004 + ... + 448043.

It is an arithmetic number, because the mean of its divisors is an integer number (3136168).

Almost surely, 2^17920940 is an apocalyptic number.

17920940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17920940 is an abundant number, since it is smaller than the sum of its proper divisors (19713076).

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

17920940 is a wasteful number, since it uses less digits than its factorization.

17920940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896056 (or 896054 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 17920940 is about 4233.3131233113. The cubic root of 17920940 is about 261.6898803338.

The spelling of 17920940 in words is "seventeen million, nine hundred twenty thousand, nine hundred forty".