22783421 has 4 divisors (see below), whose sum is σ = 23313312. Its totient is φ = 22253532.

The previous prime is 22783393. The next prime is 22783447. The reversal of 22783421 is 12438722.

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 de Polignac number, because none of the positive numbers 2^k-22783421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22783121) 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, 264881 + ... + 264966.

It is an arithmetic number, because the mean of its divisors is an integer number (5828328).

Almost surely, 2^22783421 is an apocalyptic number.

It is an amenable number.

22783421 is a deficient number, since it is larger than the sum of its proper divisors (529891).

22783421 is an equidigital number, since it uses as much as digits as its factorization.

22783421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529890.

The product of its digits is 5376, while the sum is 29.

The square root of 22783421 is about 4773.1981940833. The cubic root of 22783421 is about 283.4912410057.

The spelling of 22783421 in words is "twenty-two million, seven hundred eighty-three thousand, four hundred twenty-one".