18268430677 has 4 divisors (see below), whose sum is σ = 20878206496. Its totient is φ = 15658654860.

The previous prime is 18268430659. The next prime is 18268430683. The reversal of 18268430677 is 77603486281.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77603486281 = 379 ⋅204758539.

It is a cyclic number.

It is not a de Polignac number, because 18268430677 - 2²³ = 18260042069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268430657) 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, 1304887899 + ... + 1304887912.

It is an arithmetic number, because the mean of its divisors is an integer number (5219551624).

Almost surely, 2^18268430677 is an apocalyptic number.

It is an amenable number.

18268430677 is a deficient number, since it is larger than the sum of its proper divisors (2609775819).

18268430677 is an equidigital number, since it uses as much as digits as its factorization.

18268430677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609775818.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 18268430677 in words is "eighteen billion, two hundred sixty-eight million, four hundred thirty thousand, six hundred seventy-seven".