21883019 has 2 divisors, whose sum is σ = 21883020. Its totient is φ = 21883018.

The previous prime is 21883013. The next prime is 21883031. The reversal of 21883019 is 91038812.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21883019 is a prime.

It is a super-2 number, since 2×21883019² = 957733041108722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21883013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941509 + 10941510.

It is an arithmetic number, because the mean of its divisors is an integer number (10941510).

Almost surely, 2^21883019 is an apocalyptic number.

21883019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21883019 is an equidigital number, since it uses as much as digits as its factorization.

21883019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 21883019 is about 4677.9289220765. The cubic root of 21883019 is about 279.7064056943.

The spelling of 21883019 in words is "twenty-one million, eight hundred eighty-three thousand, nineteen".