17920442 has 16 divisors (see below), whose sum is σ = 27585792. Its totient is φ = 8727120.

The previous prime is 17920433. The next prime is 17920517. The reversal of 17920442 is 24402971.

It is a super-2 number, since 2×17920442² = 642284482950728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28928 + ... + 29540.

It is an arithmetic number, because the mean of its divisors is an integer number (1724112).

Almost surely, 2^17920442 is an apocalyptic number.

17920442 is a deficient number, since it is larger than the sum of its proper divisors (9665350).

17920442 is a wasteful number, since it uses less digits than its factorization.

17920442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 17920442 is about 4233.2543037243. The cubic root of 17920442 is about 261.6874563023.

The spelling of 17920442 in words is "seventeen million, nine hundred twenty thousand, four hundred forty-two".