18786401453 has 2 divisors, whose sum is σ = 18786401454. Its totient is φ = 18786401452.

The previous prime is 18786401353. The next prime is 18786401477. The reversal of 18786401453 is 35410468781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18757219849 + 29181604 = 136957^2 + 5402^2 .

It is a cyclic number.

It is not a de Polignac number, because 18786401453 - 2⁸ = 18786401197 is a prime.

It is a super-2 number, since 2×18786401453² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18786401398 and 18786401407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18786401353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9393200726 + 9393200727.

It is an arithmetic number, because the mean of its divisors is an integer number (9393200727).

Almost surely, 2^18786401453 is an apocalyptic number.

It is an amenable number.

18786401453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18786401453 is an equidigital number, since it uses as much as digits as its factorization.

18786401453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 18786401453 in words is "eighteen billion, seven hundred eighty-six million, four hundred one thousand, four hundred fifty-three".