19795849 has 2 divisors, whose sum is σ = 19795850. Its totient is φ = 19795848.

The previous prime is 19795823. The next prime is 19795859. The reversal of 19795849 is 94859791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 8526400 = 3357^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 19795849 - 2²¹ = 17698697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19795796 and 19795805.

It is not a weakly prime, because it can be changed into another prime (19795819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9897924 + 9897925.

It is an arithmetic number, because the mean of its divisors is an integer number (9897925).

Almost surely, 2^19795849 is an apocalyptic number.

It is an amenable number.

19795849 is a deficient number, since it is larger than the sum of its proper divisors (1).

19795849 is an equidigital number, since it uses as much as digits as its factorization.

19795849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 19795849 is about 4449.2526338701. The cubic root of 19795849 is about 270.5150160847.

The spelling of 19795849 in words is "nineteen million, seven hundred ninety-five thousand, eight hundred forty-nine".