21032983 has 8 divisors (see below), whose sum is σ = 21957920. Its totient is φ = 20126880.

The previous prime is 21032953. The next prime is 21032993. The reversal of 21032983 is 38923012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21032983 - 2⁵ = 21032951 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2403 + ... + 6916.

It is an arithmetic number, because the mean of its divisors is an integer number (2744740).

Almost surely, 2^21032983 is an apocalyptic number.

21032983 is a deficient number, since it is larger than the sum of its proper divisors (924937).

21032983 is an equidigital number, since it uses as much as digits as its factorization.

21032983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 21032983 is about 4586.1730233387. The cubic root of 21032983 is about 276.0367827124.

Adding to 21032983 its reverse (38923012), we get a palindrome (59955995).

The spelling of 21032983 in words is "twenty-one million, thirty-two thousand, nine hundred eighty-three".