18552499243 has 2 divisors, whose sum is σ = 18552499244. Its totient is φ = 18552499242.

The previous prime is 18552499171. The next prime is 18552499261. The reversal of 18552499243 is 34299425581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18552499243 is a prime.

It is not a weakly prime, because it can be changed into another prime (18552499543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9276249621 + 9276249622.

It is an arithmetic number, because the mean of its divisors is an integer number (9276249622).

Almost surely, 2^18552499243 is an apocalyptic number.

18552499243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18552499243 is an equidigital number, since it uses as much as digits as its factorization.

18552499243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 52.

The spelling of 18552499243 in words is "eighteen billion, five hundred fifty-two million, four hundred ninety-nine thousand, two hundred forty-three".