17997390827 has 8 divisors (see below), whose sum is σ = 19411225680. Its totient is φ = 16587758880.

The previous prime is 17997390821. The next prime is 17997390841. The reversal of 17997390827 is 72809379971.

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

It is a cyclic number.

It is not a de Polignac number, because 17997390827 - 2⁴ = 17997390811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17997390827.

It is not an unprimeable number, because it can be changed into a prime (17997390821) 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, 1041824 + ... + 1058957.

It is an arithmetic number, because the mean of its divisors is an integer number (2426403210).

Almost surely, 2^17997390827 is an apocalyptic number.

17997390827 is a deficient number, since it is larger than the sum of its proper divisors (1413834853).

17997390827 is a wasteful number, since it uses less digits than its factorization.

17997390827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101453.

The product of its (nonzero) digits is 12002256, while the sum is 62.

The spelling of 17997390827 in words is "seventeen billion, nine hundred ninety-seven million, three hundred ninety thousand, eight hundred twenty-seven".