19984213 has 2 divisors, whose sum is σ = 19984214. Its totient is φ = 19984212.

The previous prime is 19984189. The next prime is 19984229. The reversal of 19984213 is 31248991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 288369 = 4438^2 + 537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19984213 is a prime.

It is equal to p_1269658 and since 19984213 and 1269658 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19984253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992106 + 9992107.

It is an arithmetic number, because the mean of its divisors is an integer number (9992107).

Almost surely, 2^19984213 is an apocalyptic number.

It is an amenable number.

19984213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19984213 is an equidigital number, since it uses as much as digits as its factorization.

19984213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 19984213 is about 4470.3705662954. The cubic root of 19984213 is about 271.3703220077.

The spelling of 19984213 in words is "nineteen million, nine hundred eighty-four thousand, two hundred thirteen".