19765481147 has 2 divisors, whose sum is σ = 19765481148. Its totient is φ = 19765481146.

The previous prime is 19765481143. The next prime is 19765481149. The reversal of 19765481147 is 74118456791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19765481147 - 2² = 19765481143 is a prime.

Together with 19765481149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19765481143) 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, 9882740573 + 9882740574.

It is an arithmetic number, because the mean of its divisors is an integer number (9882740574).

Almost surely, 2^19765481147 is an apocalyptic number.

19765481147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19765481147 is an equidigital number, since it uses as much as digits as its factorization.

19765481147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 53.

The spelling of 19765481147 in words is "nineteen billion, seven hundred sixty-five million, four hundred eighty-one thousand, one hundred forty-seven".