18107357505 has 16 divisors (see below), whose sum is σ = 29044030464. Its totient is φ = 9633171200.

The previous prime is 18107357497. The next prime is 18107357507. The reversal of 18107357505 is 50575370181.

It is not a de Polignac number, because 18107357505 - 2³ = 18107357497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18107357507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1499169 + ... + 1511198.

It is an arithmetic number, because the mean of its divisors is an integer number (1815251904).

Almost surely, 2^18107357505 is an apocalyptic number.

18107357505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18107357505 is a deficient number, since it is larger than the sum of its proper divisors (10936672959).

18107357505 is a wasteful number, since it uses less digits than its factorization.

18107357505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010776.

The product of its (nonzero) digits is 147000, while the sum is 42.

The spelling of 18107357505 in words is "eighteen billion, one hundred seven million, three hundred fifty-seven thousand, five hundred five".