20846452859491 has 12 divisors (see below), whose sum is σ = 24285988028712. Its totient is φ = 17841837783168.

The previous prime is 20846452859473. The next prime is 20846452859509. The reversal of 20846452859491 is 19495825464802.

It is an interprime number because it is at equal distance from previous prime (20846452859473) and next prime (20846452859509).

It is not a de Polignac number, because 20846452859491 - 2¹⁵ = 20846452826723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20846452859411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316042665 + ... + 316108618.

It is an arithmetic number, because the mean of its divisors is an integer number (2023832335726).

Almost surely, 2^{20846452859491} is an apocalyptic number.

20846452859491 is a deficient number, since it is larger than the sum of its proper divisors (3439535169221).

20846452859491 is an equidigital number, since it uses as much as digits as its factorization.

20846452859491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632151970 (or 632151963 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 67.

The spelling of 20846452859491 in words is "twenty trillion, eight hundred forty-six billion, four hundred fifty-two million, eight hundred fifty-nine thousand, four hundred ninety-one".