22340421 has 8 divisors (see below), whose sum is σ = 33096960. Its totient is φ = 14893596.

The previous prime is 22340419. The next prime is 22340441. The reversal of 22340421 is 12404322.

It is not a de Polignac number, because 22340421 - 2¹ = 22340419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22340394 and 22340403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22340441) 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, 413685 + ... + 413738.

It is an arithmetic number, because the mean of its divisors is an integer number (4137120).

Almost surely, 2^22340421 is an apocalyptic number.

It is an amenable number.

22340421 is a deficient number, since it is larger than the sum of its proper divisors (10756539).

22340421 is an equidigital number, since it uses as much as digits as its factorization.

22340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827432 (or 827426 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22340421 is about 4726.5654549578. The cubic root of 22340421 is about 281.6418041537.

Adding to 22340421 its reverse (12404322), we get a palindrome (34744743).

The spelling of 22340421 in words is "twenty-two million, three hundred forty thousand, four hundred twenty-one".