21492883 has 2 divisors, whose sum is σ = 21492884. Its totient is φ = 21492882.

The previous prime is 21492881. The next prime is 21492937. The reversal of 21492883 is 38829412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21492883 - 2¹ = 21492881 is a prime.

Together with 21492881, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21492881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10746441 + 10746442.

It is an arithmetic number, because the mean of its divisors is an integer number (10746442).

Almost surely, 2^21492883 is an apocalyptic number.

21492883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21492883 is an equidigital number, since it uses as much as digits as its factorization.

21492883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 21492883 is about 4636.0417383798. The cubic root of 21492883 is about 278.0342029584.

The spelling of 21492883 in words is "twenty-one million, four hundred ninety-two thousand, eight hundred eighty-three".