17688840994 has 16 divisors (see below), whose sum is σ = 29879099136. Its totient is φ = 7781014800.

The previous prime is 17688840991. The next prime is 17688841007. The reversal of 17688840994 is 49904888671.

It is a super-2 number, since 2×17688840994² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17688840991) 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, 12967677 + ... + 12969040.

It is an arithmetic number, because the mean of its divisors is an integer number (1867443696).

Almost surely, 2^17688840994 is an apocalyptic number.

17688840994 is a deficient number, since it is larger than the sum of its proper divisors (12190258142).

17688840994 is a wasteful number, since it uses less digits than its factorization.

17688840994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25936761.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 17688840994 in words is "seventeen billion, six hundred eighty-eight million, eight hundred forty thousand, nine hundred ninety-four".