19889714951 has 2 divisors, whose sum is σ = 19889714952. Its totient is φ = 19889714950.

The previous prime is 19889714891. The next prime is 19889714953. The reversal of 19889714951 is 15941798891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19889714951 - 2²² = 19885520647 is a prime.

Together with 19889714953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19889714953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9944857475 + 9944857476.

It is an arithmetic number, because the mean of its divisors is an integer number (9944857476).

Almost surely, 2^19889714951 is an apocalyptic number.

19889714951 is a deficient number, since it is larger than the sum of its proper divisors (1).

19889714951 is an equidigital number, since it uses as much as digits as its factorization.

19889714951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 62.

The spelling of 19889714951 in words is "nineteen billion, eight hundred eighty-nine million, seven hundred fourteen thousand, nine hundred fifty-one".