12820478589431 has 2 divisors, whose sum is σ = 12820478589432. Its totient is φ = 12820478589430.

The previous prime is 12820478589427. The next prime is 12820478589533. The reversal of 12820478589431 is 13498587402821.

It is a weak prime.

It is an emirp because it is prime and its reverse (13498587402821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12820478589431 - 2² = 12820478589427 is a prime.

It is a super-2 number, since 2×12820478589431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12820478289431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410239294715 + 6410239294716.

It is an arithmetic number, because the mean of its divisors is an integer number (6410239294716).

Almost surely, 2^{12820478589431} is an apocalyptic number.

12820478589431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12820478589431 is an equidigital number, since it uses as much as digits as its factorization.

12820478589431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30965760, while the sum is 62.

The spelling of 12820478589431 in words is "twelve trillion, eight hundred twenty billion, four hundred seventy-eight million, five hundred eighty-nine thousand, four hundred thirty-one".