18852122381 has 2 divisors, whose sum is σ = 18852122382. Its totient is φ = 18852122380.

The previous prime is 18852122353. The next prime is 18852122447. The reversal of 18852122381 is 18322125881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12875440900 + 5976681481 = 113470^2 + 77309^2 .

It is a cyclic number.

It is not a de Polignac number, because 18852122381 - 2³⁴ = 1672253197 is a prime.

It is a super-2 number, since 2×18852122381² (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 (18852122351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9426061190 + 9426061191.

It is an arithmetic number, because the mean of its divisors is an integer number (9426061191).

Almost surely, 2^18852122381 is an apocalyptic number.

It is an amenable number.

18852122381 is a deficient number, since it is larger than the sum of its proper divisors (1).

18852122381 is an equidigital number, since it uses as much as digits as its factorization.

18852122381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 41.

The spelling of 18852122381 in words is "eighteen billion, eight hundred fifty-two million, one hundred twenty-two thousand, three hundred eighty-one".