18643004057 has 8 divisors (see below), whose sum is σ = 18684807936. Its totient is φ = 18601237872.

The previous prime is 18643004033. The next prime is 18643004063. The reversal of 18643004057 is 75040034681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18643004057 - 2¹² = 18642999961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18643004057.

It is not an unprimeable number, because it can be changed into a prime (18643004027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131158 + ... + 1147520.

It is an arithmetic number, because the mean of its divisors is an integer number (2335600992).

Almost surely, 2^18643004057 is an apocalyptic number.

It is an amenable number.

18643004057 is a deficient number, since it is larger than the sum of its proper divisors (41803879).

18643004057 is a wasteful number, since it uses less digits than its factorization.

18643004057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 18643004057 in words is "eighteen billion, six hundred forty-three million, four thousand, fifty-seven".