22403420 has 48 divisors (see below), whose sum is σ = 51038400. Its totient is φ = 8211456.

The previous prime is 22403419. The next prime is 22403503. The reversal of 22403420 is 2430422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51524 + ... + 51956.

It is an arithmetic number, because the mean of its divisors is an integer number (1063300).

Almost surely, 2^22403420 is an apocalyptic number.

22403420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22403420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25519200).

22403420 is an abundant number, since it is smaller than the sum of its proper divisors (28634980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22403420 is a wasteful number, since it uses less digits than its factorization.

22403420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22403420 is about 4733.2251161338. The cubic root of 22403420 is about 281.9062948392.

Adding to 22403420 its reverse (2430422), we get a palindrome (24833842).

The spelling of 22403420 in words is "twenty-two million, four hundred three thousand, four hundred twenty".