18856953519 has 16 divisors (see below), whose sum is σ = 25682170368. Its totient is φ = 12301615872.

The previous prime is 18856953517. The next prime is 18856953553. The reversal of 18856953519 is 91535965881.

It is not a de Polignac number, because 18856953519 - 2¹ = 18856953517 is a prime.

It is a super-2 number, since 2×18856953519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856953517) 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, 1224264 + ... + 1239570.

It is an arithmetic number, because the mean of its divisors is an integer number (1605135648).

Almost surely, 2^18856953519 is an apocalyptic number.

18856953519 is a deficient number, since it is larger than the sum of its proper divisors (6825216849).

18856953519 is a wasteful number, since it uses less digits than its factorization.

18856953519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24094.

The product of its digits is 11664000, while the sum is 60.

The spelling of 18856953519 in words is "eighteen billion, eight hundred fifty-six million, nine hundred fifty-three thousand, five hundred nineteen".