18321100453 has 2 divisors, whose sum is σ = 18321100454. Its totient is φ = 18321100452.

The previous prime is 18321100451. The next prime is 18321100507. The reversal of 18321100453 is 35400112381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17365177729 + 955922724 = 131777^2 + 30918^2 .

It is a cyclic number.

It is not a de Polignac number, because 18321100453 - 2¹ = 18321100451 is a prime.

It is a super-3 number, since 3×18321100453³ (a number of 32 digits) contains 333 as substring.

Together with 18321100451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18321100451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9160550226 + 9160550227.

It is an arithmetic number, because the mean of its divisors is an integer number (9160550227).

Almost surely, 2^18321100453 is an apocalyptic number.

It is an amenable number.

18321100453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18321100453 is an equidigital number, since it uses as much as digits as its factorization.

18321100453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 18321100453 in words is "eighteen billion, three hundred twenty-one million, one hundred thousand, four hundred fifty-three".