18352213573 has 2 divisors, whose sum is σ = 18352213574. Its totient is φ = 18352213572.

The previous prime is 18352213549. The next prime is 18352213577. The reversal of 18352213573 is 37531225381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12227272929 + 6124940644 = 110577^2 + 78262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18352213573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18352213577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9176106786 + 9176106787.

It is an arithmetic number, because the mean of its divisors is an integer number (9176106787).

Almost surely, 2^18352213573 is an apocalyptic number.

It is an amenable number.

18352213573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18352213573 is an equidigital number, since it uses as much as digits as its factorization.

18352213573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The spelling of 18352213573 in words is "eighteen billion, three hundred fifty-two million, two hundred thirteen thousand, five hundred seventy-three".