22266420 has 72 divisors (see below), whose sum is σ = 68551392. Its totient is φ = 5396160.

The previous prime is 22266407. The next prime is 22266421. The reversal of 22266420 is 2466222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22266421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5727 + ... + 8793.

Almost surely, 2^22266420 is an apocalyptic number.

22266420 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 22266420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34275696).

22266420 is an abundant number, since it is smaller than the sum of its proper divisors (46284972).

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

22266420 is a wasteful number, since it uses less digits than its factorization.

22266420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22266420 is about 4718.7307615502. The cubic root of 22266420 is about 281.3304875813.

It can be divided in two parts, 2226 and 6420, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 22266420 in words is "twenty-two million, two hundred sixty-six thousand, four hundred twenty".