18850854991007 has 16 divisors (see below), whose sum is σ = 20317746435168. Its totient is φ = 17386368854400.

The previous prime is 18850854990971. The next prime is 18850854991013. The reversal of 18850854991007 is 70019945805881.

It is a de Polignac number, because none of the positive numbers 2^k-18850854991007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18850854991057) 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, 518246873 + ... + 518283245.

It is an arithmetic number, because the mean of its divisors is an integer number (1269859152198).

Almost surely, 2^{18850854991007} is an apocalyptic number.

18850854991007 is a deficient number, since it is larger than the sum of its proper divisors (1466891444161).

18850854991007 is a wasteful number, since it uses less digits than its factorization.

18850854991007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68330.

The product of its (nonzero) digits is 29030400, while the sum is 65.

The spelling of 18850854991007 in words is "eighteen trillion, eight hundred fifty billion, eight hundred fifty-four million, nine hundred ninety-one thousand, seven".