19682939 has 2 divisors, whose sum is σ = 19682940. Its totient is φ = 19682938.

The previous prime is 19682921. The next prime is 19682969. The reversal of 19682939 is 93928691.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19682939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19682893 and 19682902.

It is not a weakly prime, because it can be changed into another prime (19682969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9841469 + 9841470.

It is an arithmetic number, because the mean of its divisors is an integer number (9841470).

Almost surely, 2^19682939 is an apocalyptic number.

19682939 is a deficient number, since it is larger than the sum of its proper divisors (1).

19682939 is an equidigital number, since it uses as much as digits as its factorization.

19682939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 19682939 is about 4436.5458410795. The cubic root of 19682939 is about 269.9997210788. Note that the first 3 decimals are identical.

The spelling of 19682939 in words is "nineteen million, six hundred eighty-two thousand, nine hundred thirty-nine".