21073883 has 4 divisors (see below), whose sum is σ = 21150240. Its totient is φ = 20997528.

The previous prime is 21073879. The next prime is 21073889. The reversal of 21073883 is 38837012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21073883 - 2² = 21073879 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21073889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37763 + ... + 38316.

It is an arithmetic number, because the mean of its divisors is an integer number (5287560).

Almost surely, 2^21073883 is an apocalyptic number.

21073883 is a deficient number, since it is larger than the sum of its proper divisors (76357).

21073883 is an equidigital number, since it uses as much as digits as its factorization.

21073883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76356.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 21073883 is about 4590.6299132036. The cubic root of 21073883 is about 276.2155906720.

The spelling of 21073883 in words is "twenty-one million, seventy-three thousand, eight hundred eighty-three".