20846452859431 has 2 divisors, whose sum is σ = 20846452859432. Its totient is φ = 20846452859430.

The previous prime is 20846452859429. The next prime is 20846452859443. The reversal of 20846452859431 is 13495825464802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20846452859431 - 2¹ = 20846452859429 is a prime.

It is a super-2 number, since 2×20846452859431² (a number of 27 digits) contains 22 as substring.

Together with 20846452859429, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20846452859431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20846452859411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10423226429715 + 10423226429716.

It is an arithmetic number, because the mean of its divisors is an integer number (10423226429716).

Almost surely, 2^{20846452859431} is an apocalyptic number.

20846452859431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20846452859431 is an equidigital number, since it uses as much as digits as its factorization.

20846452859431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66355200, while the sum is 61.

The spelling of 20846452859431 in words is "twenty trillion, eight hundred forty-six billion, four hundred fifty-two million, eight hundred fifty-nine thousand, four hundred thirty-one".