18357990107 has 16 divisors (see below), whose sum is σ = 19655123040. Its totient is φ = 17085585408.

The previous prime is 18357990097. The next prime is 18357990113. The reversal of 18357990107 is 70109975381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18357990107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18357990127) 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, 1026143 + ... + 1043879.

It is an arithmetic number, because the mean of its divisors is an integer number (1228445190).

Almost surely, 2^18357990107 is an apocalyptic number.

18357990107 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18357990107 is a deficient number, since it is larger than the sum of its proper divisors (1297132933).

18357990107 is a wasteful number, since it uses less digits than its factorization.

18357990107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18430.

The product of its (nonzero) digits is 476280, while the sum is 50.

The spelling of 18357990107 in words is "eighteen billion, three hundred fifty-seven million, nine hundred ninety thousand, one hundred seven".