19697261147 has 2 divisors, whose sum is σ = 19697261148. Its totient is φ = 19697261146.

The previous prime is 19697261141. The next prime is 19697261179. The reversal of 19697261147 is 74116279691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19697261147 - 2⁶ = 19697261083 is a prime.

It is not a weakly prime, because it can be changed into another prime (19697261141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9848630573 + 9848630574.

It is an arithmetic number, because the mean of its divisors is an integer number (9848630574).

Almost surely, 2^19697261147 is an apocalyptic number.

19697261147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19697261147 is an equidigital number, since it uses as much as digits as its factorization.

19697261147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 53.

The spelling of 19697261147 in words is "nineteen billion, six hundred ninety-seven million, two hundred sixty-one thousand, one hundred forty-seven".