17842008921 has 16 divisors (see below), whose sum is σ = 25984051968. Its totient is φ = 10799989200.

The previous prime is 17842008883. The next prime is 17842008931. The reversal of 17842008921 is 12980024871.

It is not a de Polignac number, because 17842008921 - 2⁶ = 17842008857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17842008931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306571 + ... + 360096.

It is an arithmetic number, because the mean of its divisors is an integer number (1624003248).

Almost surely, 2^17842008921 is an apocalyptic number.

17842008921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17842008921 is a deficient number, since it is larger than the sum of its proper divisors (8142043047).

17842008921 is a wasteful number, since it uses less digits than its factorization.

17842008921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667492.

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 17842008921 in words is "seventeen billion, eight hundred forty-two million, eight thousand, nine hundred twenty-one".