18226520687907 has 24 divisors (see below), whose sum is σ = 30135908092160. Its totient is φ = 10398648864240.

The previous prime is 18226520687897. The next prime is 18226520687929. The reversal of 18226520687907 is 70978602562281.

18226520687907 is a `hidden beast` number, since 1 + 8 + 2 + 26 + 520 + 6 + 87 + 9 + 0 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-18226520687907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18226520682907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229207357 + ... + 229286862.

Almost surely, 2^{18226520687907} is an apocalyptic number.

18226520687907 is a deficient number, since it is larger than the sum of its proper divisors (11909387404253).

18226520687907 is a wasteful number, since it uses less digits than its factorization.

18226520687907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458494863 (or 458494860 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 18226520687907 in words is "eighteen trillion, two hundred twenty-six billion, five hundred twenty million, six hundred eighty-seven thousand, nine hundred seven".