17990915069 has 16 divisors (see below), whose sum is σ = 18993070080. Its totient is φ = 17016167280.

The previous prime is 17990915029. The next prime is 17990915179. The reversal of 17990915069 is 96051909971.

It is a cyclic number.

It is not a de Polignac number, because 17990915069 - 2⁸ = 17990914813 is a prime.

It is a super-2 number, since 2×17990915069² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17990915029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074242 + ... + 1090860.

It is an arithmetic number, because the mean of its divisors is an integer number (1187066880).

Almost surely, 2^17990915069 is an apocalyptic number.

It is an amenable number.

17990915069 is a deficient number, since it is larger than the sum of its proper divisors (1002155011).

17990915069 is a wasteful number, since it uses less digits than its factorization.

17990915069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17440.

The product of its (nonzero) digits is 1377810, while the sum is 56.

The spelling of 17990915069 in words is "seventeen billion, nine hundred ninety million, nine hundred fifteen thousand, sixty-nine".