18861703794907 has 4 divisors (see below), whose sum is σ = 18865418927776. Its totient is φ = 18857988662040.

The previous prime is 18861703794883. The next prime is 18861703794919. The reversal of 18861703794907 is 70949730716881.

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 18861703794907 - 2¹¹ = 18861703792859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18861703194907) 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, 1857558819 + ... + 1857568972.

It is an arithmetic number, because the mean of its divisors is an integer number (4716354731944).

Almost surely, 2^{18861703794907} is an apocalyptic number.

18861703794907 is a deficient number, since it is larger than the sum of its proper divisors (3715132869).

18861703794907 is an equidigital number, since it uses as much as digits as its factorization.

18861703794907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715132868.

The product of its (nonzero) digits is 128024064, while the sum is 70.

The spelling of 18861703794907 in words is "eighteen trillion, eight hundred sixty-one billion, seven hundred three million, seven hundred ninety-four thousand, nine hundred seven".