18512303077 has 16 divisors (see below), whose sum is σ = 19412600832. Its totient is φ = 17631448560.

The previous prime is 18512303071. The next prime is 18512303081. The reversal of 18512303077 is 77030321581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18512303077 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 (18512303071) 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, 2661318 + ... + 2668264.

It is an arithmetic number, because the mean of its divisors is an integer number (1213287552).

Almost surely, 2^18512303077 is an apocalyptic number.

It is an amenable number.

18512303077 is a deficient number, since it is larger than the sum of its proper divisors (900297755).

18512303077 is a wasteful number, since it uses less digits than its factorization.

18512303077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 18512303077 in words is "eighteen billion, five hundred twelve million, three hundred three thousand, seventy-seven".