18856036453 has 2 divisors, whose sum is σ = 18856036454. Its totient is φ = 18856036452.

The previous prime is 18856036439. The next prime is 18856036477. The reversal of 18856036453 is 35463065881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14607864769 + 4248171684 = 120863^2 + 65178^2 .

It is a cyclic number.

It is not a de Polignac number, because 18856036453 - 2³³ = 10266101861 is a prime.

It is a super-2 number, since 2×18856036453² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18856036397 and 18856036406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18856036153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9428018226 + 9428018227.

It is an arithmetic number, because the mean of its divisors is an integer number (9428018227).

Almost surely, 2^18856036453 is an apocalyptic number.

It is an amenable number.

18856036453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18856036453 is an equidigital number, since it uses as much as digits as its factorization.

18856036453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 18856036453 in words is "eighteen billion, eight hundred fifty-six million, thirty-six thousand, four hundred fifty-three".