19725029 has 2 divisors, whose sum is σ = 19725030. Its totient is φ = 19725028.

The previous prime is 19725011. The next prime is 19725037. The reversal of 19725029 is 92052791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 452929 = 4390^2 + 673^2 .

It is an emirp because it is prime and its reverse (92052791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19725029 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19725029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19725229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9862514 + 9862515.

It is an arithmetic number, because the mean of its divisors is an integer number (9862515).

Almost surely, 2^19725029 is an apocalyptic number.

It is an amenable number.

19725029 is a deficient number, since it is larger than the sum of its proper divisors (1).

19725029 is an equidigital number, since it uses as much as digits as its factorization.

19725029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 19725029 is about 4441.2868630612. The cubic root of 19725029 is about 270.1920398751.

The spelling of 19725029 in words is "nineteen million, seven hundred twenty-five thousand, twenty-nine".