18553279363 has 2 divisors, whose sum is σ = 18553279364. Its totient is φ = 18553279362.

The previous prime is 18553279361. The next prime is 18553279379. The reversal of 18553279363 is 36397235581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18553279363 - 2¹ = 18553279361 is a prime.

Together with 18553279361, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18553279363.

It is not a weakly prime, because it can be changed into another prime (18553279361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9276639681 + 9276639682.

It is an arithmetic number, because the mean of its divisors is an integer number (9276639682).

Almost surely, 2^18553279363 is an apocalyptic number.

18553279363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18553279363 is an equidigital number, since it uses as much as digits as its factorization.

18553279363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 52.

The spelling of 18553279363 in words is "eighteen billion, five hundred fifty-three million, two hundred seventy-nine thousand, three hundred sixty-three".