19477146397 has 2 divisors, whose sum is σ = 19477146398. Its totient is φ = 19477146396.

The previous prime is 19477146361. The next prime is 19477146467. The reversal of 19477146397 is 79364177491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17664004836 + 1813141561 = 132906^2 + 42581^2 .

It is a cyclic number.

It is not a de Polignac number, because 19477146397 - 2¹⁵ = 19477113629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19477146697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9738573198 + 9738573199.

It is an arithmetic number, because the mean of its divisors is an integer number (9738573199).

Almost surely, 2^19477146397 is an apocalyptic number.

It is an amenable number.

19477146397 is a deficient number, since it is larger than the sum of its proper divisors (1).

19477146397 is an equidigital number, since it uses as much as digits as its factorization.

19477146397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 58.

The spelling of 19477146397 in words is "nineteen billion, four hundred seventy-seven million, one hundred forty-six thousand, three hundred ninety-seven".