19949827 has 2 divisors, whose sum is σ = 19949828. Its totient is φ = 19949826.

The previous prime is 19949819. The next prime is 19949837. The reversal of 19949827 is 72894991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19949827 - 2³ = 19949819 is a prime.

It is not a weakly prime, because it can be changed into another prime (19949837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9974913 + 9974914.

It is an arithmetic number, because the mean of its divisors is an integer number (9974914).

Almost surely, 2^19949827 is an apocalyptic number.

19949827 is a deficient number, since it is larger than the sum of its proper divisors (1).

19949827 is an equidigital number, since it uses as much as digits as its factorization.

19949827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 19949827 is about 4466.5229205726. The cubic root of 19949827 is about 271.2145874615.

The spelling of 19949827 in words is "nineteen million, nine hundred forty-nine thousand, eight hundred twenty-seven".