18644857039053 has 24 divisors (see below), whose sum is σ = 30852269448000. Its totient is φ = 10628776312704.

The previous prime is 18644857039049. The next prime is 18644857039079. The reversal of 18644857039053 is 35093075844681.

18644857039053 is a `hidden beast` number, since 1 + 8 + 6 + 4 + 4 + 8 + 570 + 3 + 9 + 0 + 53 = 666.

It is not a de Polignac number, because 18644857039053 - 2² = 18644857039049 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18644857039253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353136028 + ... + 353188821.

It is an arithmetic number, because the mean of its divisors is an integer number (1285511227000).

Almost surely, 2^{18644857039053} is an apocalyptic number.

It is an amenable number.

18644857039053 is a deficient number, since it is larger than the sum of its proper divisors (12207412408947).

18644857039053 is a wasteful number, since it uses less digits than its factorization.

18644857039053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706325281 (or 706325278 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 18644857039053 in words is "eighteen trillion, six hundred forty-four billion, eight hundred fifty-seven million, thirty-nine thousand, fifty-three".