18853257969 has 24 divisors (see below), whose sum is σ = 33516904512. Its totient is φ = 9944575200.

The previous prime is 18853257961. The next prime is 18853257971. The reversal of 18853257969 is 96975235881.

18853257969 is a `hidden beast` number, since 1 + 8 + 8 + 53 + 2 + 579 + 6 + 9 = 666.

It is not a de Polignac number, because 18853257969 - 2³ = 18853257961 is a prime.

It is a super-2 number, since 2×18853257969² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18853257961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11509107 + ... + 11510744.

It is an arithmetic number, because the mean of its divisors is an integer number (1396537688).

Almost surely, 2^18853257969 is an apocalyptic number.

It is an amenable number.

18853257969 is a deficient number, since it is larger than the sum of its proper divisors (14663646543).

18853257969 is a wasteful number, since it uses less digits than its factorization.

18853257969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23019877 (or 23019874 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 18853257969 in words is "eighteen billion, eight hundred fifty-three million, two hundred fifty-seven thousand, nine hundred sixty-nine".