18351852553 has 2 divisors, whose sum is σ = 18351852554. Its totient is φ = 18351852552.

The previous prime is 18351852551. The next prime is 18351852667. The reversal of 18351852553 is 35525815381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18351579024 + 273529 = 135468^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 18351852553 - 2¹ = 18351852551 is a prime.

Together with 18351852551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18351852551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175926276 + 9175926277.

It is an arithmetic number, because the mean of its divisors is an integer number (9175926277).

Almost surely, 2^18351852553 is an apocalyptic number.

It is an amenable number.

18351852553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351852553 is an equidigital number, since it uses as much as digits as its factorization.

18351852553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720000, while the sum is 46.

The spelling of 18351852553 in words is "eighteen billion, three hundred fifty-one million, eight hundred fifty-two thousand, five hundred fifty-three".