19604971 has 2 divisors, whose sum is σ = 19604972. Its totient is φ = 19604970.

The previous prime is 19604951. The next prime is 19604987. The reversal of 19604971 is 17940691.

It is a strong prime.

It is an emirp because it is prime and its reverse (17940691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19604971 - 2⁵ = 19604939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19604971.

It is not a weakly prime, because it can be changed into another prime (19604911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9802485 + 9802486.

It is an arithmetic number, because the mean of its divisors is an integer number (9802486).

Almost surely, 2^19604971 is an apocalyptic number.

19604971 is a deficient number, since it is larger than the sum of its proper divisors (1).

19604971 is an equidigital number, since it uses as much as digits as its factorization.

19604971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 19604971 is about 4427.7501058664. The cubic root of 19604971 is about 269.6427419415.

The spelling of 19604971 in words is "nineteen million, six hundred four thousand, nine hundred seventy-one".