18627937807 has 4 divisors (see below), whose sum is σ = 19270280520. Its totient is φ = 17985595096.

The previous prime is 18627937771. The next prime is 18627937829. The reversal of 18627937807 is 70873972681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18627937807 - 2¹⁵ = 18627905039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18627937837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321171313 + ... + 321171370.

It is an arithmetic number, because the mean of its divisors is an integer number (4817570130).

Almost surely, 2^18627937807 is an apocalyptic number.

18627937807 is a deficient number, since it is larger than the sum of its proper divisors (642342713).

18627937807 is an equidigital number, since it uses as much as digits as its factorization.

18627937807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642342712.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 18627937807 in words is "eighteen billion, six hundred twenty-seven million, nine hundred thirty-seven thousand, eight hundred seven".