18256949253 has 6 divisors (see below), whose sum is σ = 26371148934. Its totient is φ = 12171299496.

The previous prime is 18256949237. The next prime is 18256949261. The reversal of 18256949253 is 35294965281.

18256949253 is a `hidden beast` number, since 18 + 2 + 569 + 49 + 25 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16414221924 + 1842727329 = 128118^2 + 42927^2 .

It is not a de Polignac number, because 18256949253 - 2⁴ = 18256949237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18256949253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18256949233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1014274950 + ... + 1014274967.

It is an arithmetic number, because the mean of its divisors is an integer number (4395191489).

Almost surely, 2^18256949253 is an apocalyptic number.

It is an amenable number.

18256949253 is a deficient number, since it is larger than the sum of its proper divisors (8114199681).

18256949253 is a wasteful number, since it uses less digits than its factorization.

18256949253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028549923 (or 2028549920 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 18256949253 in words is "eighteen billion, two hundred fifty-six million, nine hundred forty-nine thousand, two hundred fifty-three".