21132983 has 2 divisors, whose sum is σ = 21132984. Its totient is φ = 21132982.

The previous prime is 21132953. The next prime is 21133003. The reversal of 21132983 is 38923112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21132983 - 2¹⁰ = 21131959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566491 + 10566492.

It is an arithmetic number, because the mean of its divisors is an integer number (10566492).

Almost surely, 2^21132983 is an apocalyptic number.

21132983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132983 is an equidigital number, since it uses as much as digits as its factorization.

21132983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 21132983 is about 4597.0624315969. The cubic root of 21132983 is about 276.4735577655.

The spelling of 21132983 in words is "twenty-one million, one hundred thirty-two thousand, nine hundred eighty-three".