19924973 has 2 divisors, whose sum is σ = 19924974. Its totient is φ = 19924972.

The previous prime is 19924967. The next prime is 19924987. The reversal of 19924973 is 37942991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 6360484 = 3683^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 19924973 - 2⁸ = 19924717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19924913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9962486 + 9962487.

It is an arithmetic number, because the mean of its divisors is an integer number (9962487).

Almost surely, 2^19924973 is an apocalyptic number.

It is an amenable number.

19924973 is a deficient number, since it is larger than the sum of its proper divisors (1).

19924973 is an equidigital number, since it uses as much as digits as its factorization.

19924973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 19924973 is about 4463.7397997643. The cubic root of 19924973 is about 271.1019119887.

The spelling of 19924973 in words is "nineteen million, nine hundred twenty-four thousand, nine hundred seventy-three".