19934899 has 2 divisors, whose sum is σ = 19934900. Its totient is φ = 19934898.

The previous prime is 19934879. The next prime is 19934903. The reversal of 19934899 is 99843991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19934899 - 2⁵ = 19934867 is a prime.

It is not a weakly prime, because it can be changed into another prime (19934839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9967449 + 9967450.

It is an arithmetic number, because the mean of its divisors is an integer number (9967450).

Almost surely, 2^19934899 is an apocalyptic number.

19934899 is a deficient number, since it is larger than the sum of its proper divisors (1).

19934899 is an equidigital number, since it uses as much as digits as its factorization.

19934899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 19934899 is about 4464.8515092890. The cubic root of 19934899 is about 271.1469226871.

The spelling of 19934899 in words is "nineteen million, nine hundred thirty-four thousand, eight hundred ninety-nine".