17720042 has 8 divisors (see below), whose sum is σ = 27198336. Its totient is φ = 8653932.

The previous prime is 17720041. The next prime is 17720063. The reversal of 17720042 is 24002771.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (17720041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102938 + ... + 103109.

It is an arithmetic number, because the mean of its divisors is an integer number (3399792).

Almost surely, 2^17720042 is an apocalyptic number.

17720042 is a deficient number, since it is larger than the sum of its proper divisors (9478294).

17720042 is a wasteful number, since it uses less digits than its factorization.

17720042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206092.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 17720042 is about 4209.5180246674. The cubic root of 17720042 is about 260.7083347577.

The spelling of 17720042 in words is "seventeen million, seven hundred twenty thousand, forty-two".