18364857290 has 32 divisors (see below), whose sum is σ = 35752416336. Its totient is φ = 6751756800.

The previous prime is 18364857263. The next prime is 18364857299. The reversal of 18364857290 is 9275846381.

It is a Cunningham number, because it is equal to 135517²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 6611478721 + 11753378569 = 81311^2 + 108413^2 .

It is a super-2 number, since 2×18364857290² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18364857299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272861 + ... + 333440.

It is a 2-persistent number, because it is pandigital, and so is 2⋅18364857290 = 36729714580, but 3⋅18364857290 = 55094571870 is not.

Almost surely, 2^18364857290 is an apocalyptic number.

18364857290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18364857290 is a deficient number, since it is larger than the sum of its proper divisors (17387559046).

18364857290 is a wasteful number, since it uses less digits than its factorization.

18364857290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606554.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 18364857290 in words is "eighteen billion, three hundred sixty-four million, eight hundred fifty-seven thousand, two hundred ninety".