19783226818231 has 2 divisors, whose sum is σ = 19783226818232. Its totient is φ = 19783226818230.

The previous prime is 19783226818163. The next prime is 19783226818241. The reversal of 19783226818231 is 13281862238791.

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-19783226818231 is a prime.

It is a super-2 number, since 2×19783226818231² (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 19783226818231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19783226818241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9891613409115 + 9891613409116.

It is an arithmetic number, because the mean of its divisors is an integer number (9891613409116).

Almost surely, 2^{19783226818231} is an apocalyptic number.

19783226818231 is a deficient number, since it is larger than the sum of its proper divisors (1).

19783226818231 is an equidigital number, since it uses as much as digits as its factorization.

19783226818231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 61.

The spelling of 19783226818231 in words is "nineteen trillion, seven hundred eighty-three billion, two hundred twenty-six million, eight hundred eighteen thousand, two hundred thirty-one".