19676437973 has 2 divisors, whose sum is σ = 19676437974. Its totient is φ = 19676437972.

The previous prime is 19676437931. The next prime is 19676437987. The reversal of 19676437973 is 37973467691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11116117489 + 8560320484 = 105433^2 + 92522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19676437973 is a prime.

It is a super-2 number, since 2×19676437973² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19676407973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9838218986 + 9838218987.

It is an arithmetic number, because the mean of its divisors is an integer number (9838218987).

Almost surely, 2^19676437973 is an apocalyptic number.

It is an amenable number.

19676437973 is a deficient number, since it is larger than the sum of its proper divisors (1).

19676437973 is an equidigital number, since it uses as much as digits as its factorization.

19676437973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36006768, while the sum is 62.

The spelling of 19676437973 in words is "nineteen billion, six hundred seventy-six million, four hundred thirty-seven thousand, nine hundred seventy-three".