19425947 has 2 divisors, whose sum is σ = 19425948. Its totient is φ = 19425946.

The previous prime is 19425919. The next prime is 19425949. The reversal of 19425947 is 74952491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19425947 - 2²⁰ = 18377371 is a prime.

Together with 19425949, 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 (19425949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9712973 + 9712974.

It is an arithmetic number, because the mean of its divisors is an integer number (9712974).

Almost surely, 2^19425947 is an apocalyptic number.

19425947 is a deficient number, since it is larger than the sum of its proper divisors (1).

19425947 is an equidigital number, since it uses as much as digits as its factorization.

19425947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 19425947 is about 4407.4876063354. The cubic root of 19425947 is about 268.8194778364.

The spelling of 19425947 in words is "nineteen million, four hundred twenty-five thousand, nine hundred forty-seven".