22168420 has 24 divisors (see below), whose sum is σ = 46985400. Its totient is φ = 8785152.

The previous prime is 22168417. The next prime is 22168429. The reversal of 22168420 is 2486122.

22168420 = T₇₅ + T₇₆ + ... + T₅₁₀.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8904256 + 13264164 = 2984^2 + 3642^2 .

It is not an unprimeable number, because it can be changed into a prime (22168429) 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, 2905 + ... + 7264.

It is an arithmetic number, because the mean of its divisors is an integer number (1957725).

Almost surely, 2^22168420 is an apocalyptic number.

22168420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22168420 is an abundant number, since it is smaller than the sum of its proper divisors (24816980).

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

22168420 is a wasteful number, since it uses less digits than its factorization.

22168420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287 (or 10285 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 22168420 is about 4708.3351622415. The cubic root of 22168420 is about 280.9171456521.

The spelling of 22168420 in words is "twenty-two million, one hundred sixty-eight thousand, four hundred twenty".