18665719053 has 4 divisors (see below), whose sum is σ = 24887625408. Its totient is φ = 12443812700.

The previous prime is 18665719003. The next prime is 18665719057. The reversal of 18665719053 is 35091756681.

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 18665719053 - 2⁶ = 18665718989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18665718987 and 18665719005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18665719057) 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, 3110953173 + ... + 3110953178.

It is an arithmetic number, because the mean of its divisors is an integer number (6221906352).

Almost surely, 2^18665719053 is an apocalyptic number.

It is an amenable number.

18665719053 is a deficient number, since it is larger than the sum of its proper divisors (6221906355).

18665719053 is an equidigital number, since it uses as much as digits as its factorization.

18665719053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221906354.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 18665719053 in words is "eighteen billion, six hundred sixty-five million, seven hundred nineteen thousand, fifty-three".