21719483 has 2 divisors, whose sum is σ = 21719484. Its totient is φ = 21719482.

The previous prime is 21719479. The next prime is 21719491. The reversal of 21719483 is 38491712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21719483 - 2² = 21719479 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21719443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10859741 + 10859742.

It is an arithmetic number, because the mean of its divisors is an integer number (10859742).

Almost surely, 2^21719483 is an apocalyptic number.

21719483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21719483 is an equidigital number, since it uses as much as digits as its factorization.

21719483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 21719483 is about 4660.4166122783. The cubic root of 21719483 is about 279.0078962150.

The spelling of 21719483 in words is "twenty-one million, seven hundred nineteen thousand, four hundred eighty-three".