21282373 has 8 divisors (see below), whose sum is σ = 24353792. Its totient is φ = 18218736.

The previous prime is 21282361. The next prime is 21282379. The reversal of 21282373 is 37328212.

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 21282373 - 2⁵ = 21282341 is a prime.

It is a super-2 number, since 2×21282373² = 905878801022258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21282379) 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, 6211 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (3044224).

Almost surely, 2^21282373 is an apocalyptic number.

It is an amenable number.

21282373 is a deficient number, since it is larger than the sum of its proper divisors (3071419).

21282373 is a wasteful number, since it uses less digits than its factorization.

21282373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891.

The product of its digits is 4032, while the sum is 28.

The square root of 21282373 is about 4613.2822371930. The cubic root of 21282373 is about 277.1234966535.

The spelling of 21282373 in words is "twenty-one million, two hundred eighty-two thousand, three hundred seventy-three".