19879734563473 has 2 divisors, whose sum is σ = 19879734563474. Its totient is φ = 19879734563472.

The previous prime is 19879734563459. The next prime is 19879734563567. The reversal of 19879734563473 is 37436543797891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14121308855889 + 5758425707584 = 3757833^2 + 2399672^2 .

It is a cyclic number.

It is not a de Polignac number, because 19879734563473 - 2³⁷ = 19742295610001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19879734563473.

It is not a weakly prime, because it can be changed into another prime (19879734533473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9939867281736 + 9939867281737.

It is an arithmetic number, because the mean of its divisors is an integer number (9939867281737).

Almost surely, 2^{19879734563473} is an apocalyptic number.

It is an amenable number.

19879734563473 is a deficient number, since it is larger than the sum of its proper divisors (1).

19879734563473 is an equidigital number, since it uses as much as digits as its factorization.

19879734563473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880541440, while the sum is 76.

The spelling of 19879734563473 in words is "nineteen trillion, eight hundred seventy-nine billion, seven hundred thirty-four million, five hundred sixty-three thousand, four hundred seventy-three".