19745039 has 2 divisors, whose sum is σ = 19745040. Its totient is φ = 19745038.

The previous prime is 19745021. The next prime is 19745051. The reversal of 19745039 is 93054791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19745039 - 2²⁰ = 18696463 is a prime.

It is a super-2 number, since 2×19745039² = 779733130223042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19744993 and 19745011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19745069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9872519 + 9872520.

It is an arithmetic number, because the mean of its divisors is an integer number (9872520).

Almost surely, 2^19745039 is an apocalyptic number.

19745039 is a deficient number, since it is larger than the sum of its proper divisors (1).

19745039 is an equidigital number, since it uses as much as digits as its factorization.

19745039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 19745039 is about 4443.5390174950. The cubic root of 19745039 is about 270.2833741815.

The spelling of 19745039 in words is "nineteen million, seven hundred forty-five thousand, thirty-nine".