17990888418 has 24 divisors (see below), whose sum is σ = 41273215308. Its totient is φ = 5644200192.

The previous prime is 17990888411. The next prime is 17990888429. The reversal of 17990888418 is 81488809971.

It can be written as a sum of positive squares in 2 ways, for example, as 17983614609 + 7273809 = 134103^2 + 2697^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17990888411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29396571 + ... + 29397182.

Almost surely, 2^17990888418 is an apocalyptic number.

17990888418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

17990888418 is an abundant number, since it is smaller than the sum of its proper divisors (23282326890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17990888418 is a wasteful number, since it uses less digits than its factorization.

17990888418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58793778 (or 58793775 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 63.

The spelling of 17990888418 in words is "seventeen billion, nine hundred ninety million, eight hundred eighty-eight thousand, four hundred eighteen".