19950647 has 2 divisors, whose sum is σ = 19950648. Its totient is φ = 19950646.

The previous prime is 19950587. The next prime is 19950661. The reversal of 19950647 is 74605991.

It is a strong prime.

It is an emirp because it is prime and its reverse (74605991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19950647 - 2⁶ = 19950583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19950947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9975323 + 9975324.

It is an arithmetic number, because the mean of its divisors is an integer number (9975324).

Almost surely, 2^19950647 is an apocalyptic number.

19950647 is a deficient number, since it is larger than the sum of its proper divisors (1).

19950647 is an equidigital number, since it uses as much as digits as its factorization.

19950647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 19950647 is about 4466.6147136282. The cubic root of 19950647 is about 271.2183033319.

The spelling of 19950647 in words is "nineteen million, nine hundred fifty thousand, six hundred forty-seven".