22847421 has 4 divisors (see below), whose sum is σ = 30463232. Its totient is φ = 15231612.

The previous prime is 22847417. The next prime is 22847431. The reversal of 22847421 is 12474822.

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 not a de Polignac number, because 22847421 - 2² = 22847417 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 (22847401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3807901 + ... + 3807906.

It is an arithmetic number, because the mean of its divisors is an integer number (7615808).

Almost surely, 2^22847421 is an apocalyptic number.

It is an amenable number.

22847421 is a deficient number, since it is larger than the sum of its proper divisors (7615811).

22847421 is an equidigital number, since it uses as much as digits as its factorization.

22847421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615810.

The product of its digits is 7168, while the sum is 30.

The square root of 22847421 is about 4779.8975930453. The cubic root of 22847421 is about 283.7564408223.

The spelling of 22847421 in words is "twenty-two million, eight hundred forty-seven thousand, four hundred twenty-one".