19920673 has 2 divisors, whose sum is σ = 19920674. Its totient is φ = 19920672.

The previous prime is 19920671. The next prime is 19920707. The reversal of 19920673 is 37602991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 2304 = 4463^2 + 48^2 .

It is a cyclic number.

It is not a de Polignac number, because 19920673 - 2¹ = 19920671 is a prime.

Together with 19920671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19920671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9960336 + 9960337.

It is an arithmetic number, because the mean of its divisors is an integer number (9960337).

Almost surely, 2^19920673 is an apocalyptic number.

It is an amenable number.

19920673 is a deficient number, since it is larger than the sum of its proper divisors (1).

19920673 is an equidigital number, since it uses as much as digits as its factorization.

19920673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 19920673 is about 4463.2581148753. The cubic root of 19920673 is about 271.0824084559.

The spelling of 19920673 in words is "nineteen million, nine hundred twenty thousand, six hundred seventy-three".