18935245809331 has 2 divisors, whose sum is σ = 18935245809332. Its totient is φ = 18935245809330.

The previous prime is 18935245809307. The next prime is 18935245809349. The reversal of 18935245809331 is 13390854253981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18935245809331 - 2¹⁷ = 18935245678259 is a prime.

It is a super-2 number, since 2×18935245809331² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18935245809331.

It is not a weakly prime, because it can be changed into another prime (18935245809371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9467622904665 + 9467622904666.

It is an arithmetic number, because the mean of its divisors is an integer number (9467622904666).

Almost surely, 2^{18935245809331} is an apocalyptic number.

18935245809331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18935245809331 is an equidigital number, since it uses as much as digits as its factorization.

18935245809331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 18935245809331 in words is "eighteen trillion, nine hundred thirty-five billion, two hundred forty-five million, eight hundred nine thousand, three hundred thirty-one".