19995929 has 2 divisors, whose sum is σ = 19995930. Its totient is φ = 19995928.

The previous prime is 19995919. The next prime is 19995953. The reversal of 19995929 is 92959991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 104329 = 4460^2 + 323^2 .

It is a cyclic number.

It is not a de Polignac number, because 19995929 - 2⁸ = 19995673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19995919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997964 + 9997965.

It is an arithmetic number, because the mean of its divisors is an integer number (9997965).

Almost surely, 2^19995929 is an apocalyptic number.

It is an amenable number.

19995929 is a deficient number, since it is larger than the sum of its proper divisors (1).

19995929 is an equidigital number, since it uses as much as digits as its factorization.

19995929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 590490, while the sum is 53.

The square root of 19995929 is about 4471.6807801989. The cubic root of 19995929 is about 271.4233430862.

The spelling of 19995929 in words is "nineteen million, nine hundred ninety-five thousand, nine hundred twenty-nine".