21793373 has 4 divisors (see below), whose sum is σ = 24906720. Its totient is φ = 18680028.

The previous prime is 21793363. The next prime is 21793451. The reversal of 21793373 is 37339712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21793373 - 2⁸ = 21793117 is a prime.

It is a super-2 number, since 2×21793373² = 949902213434258, 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 (21793313) 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, 1556663 + ... + 1556676.

It is an arithmetic number, because the mean of its divisors is an integer number (6226680).

Almost surely, 2^21793373 is an apocalyptic number.

It is an amenable number.

21793373 is a deficient number, since it is larger than the sum of its proper divisors (3113347).

21793373 is an equidigital number, since it uses as much as digits as its factorization.

21793373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113346.

The product of its digits is 23814, while the sum is 35.

The square root of 21793373 is about 4668.3372843016. The cubic root of 21793373 is about 279.3239344162.

The spelling of 21793373 in words is "twenty-one million, seven hundred ninety-three thousand, three hundred seventy-three".