19956043 has 2 divisors, whose sum is σ = 19956044. Its totient is φ = 19956042.

The previous prime is 19955989. The next prime is 19956049. The reversal of 19956043 is 34065991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19956043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19955993 and 19956011.

It is not a weakly prime, because it can be changed into another prime (19956049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9978021 + 9978022.

It is an arithmetic number, because the mean of its divisors is an integer number (9978022).

Almost surely, 2^19956043 is an apocalyptic number.

19956043 is a deficient number, since it is larger than the sum of its proper divisors (1).

19956043 is an equidigital number, since it uses as much as digits as its factorization.

19956043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 19956043 is about 4467.2187096671. The cubic root of 19956043 is about 271.2427530325.

The spelling of 19956043 in words is "nineteen million, nine hundred fifty-six thousand, forty-three".