18707885427061 has 4 divisors (see below), whose sum is σ = 18707976216832. Its totient is φ = 18707794637292.

The previous prime is 18707885427059. The next prime is 18707885427071. The reversal of 18707885427061 is 16072458870781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18707885427061 - 2¹ = 18707885427059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18707885426984 and 18707885427002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18707885427071) 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, 45085095 + ... + 45498148.

It is an arithmetic number, because the mean of its divisors is an integer number (4676994054208).

Almost surely, 2^{18707885427061} is an apocalyptic number.

It is an amenable number.

18707885427061 is a deficient number, since it is larger than the sum of its proper divisors (90789771).

18707885427061 is an equidigital number, since it uses as much as digits as its factorization.

18707885427061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90789770.

The product of its (nonzero) digits is 42147840, while the sum is 64.

The spelling of 18707885427061 in words is "eighteen trillion, seven hundred seven billion, eight hundred eighty-five million, four hundred twenty-seven thousand, sixty-one".