18773002453 has 2 divisors, whose sum is σ = 18773002454. Its totient is φ = 18773002452.

The previous prime is 18773002433. The next prime is 18773002483. The reversal of 18773002453 is 35420037781.

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., 14146009969 + 4626992484 = 118937^2 + 68022^2 .

It is a cyclic number.

It is not a de Polignac number, because 18773002453 - 2⁹ = 18773001941 is a prime.

It is a super-2 number, since 2×18773002453² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18773002433) 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 as a sum of consecutive naturals, namely, 9386501226 + 9386501227.

It is an arithmetic number, because the mean of its divisors is an integer number (9386501227).

Almost surely, 2^18773002453 is an apocalyptic number.

It is an amenable number.

18773002453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18773002453 is an equidigital number, since it uses as much as digits as its factorization.

18773002453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 18773002453 in words is "eighteen billion, seven hundred seventy-three million, two thousand, four hundred fifty-three".