22420220 has 12 divisors (see below), whose sum is σ = 47082504. Its totient is φ = 8968080.

The previous prime is 22420213. The next prime is 22420241. The reversal of 22420220 is 2202422.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22420195 and 22420204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560486 + ... + 560525.

It is an arithmetic number, because the mean of its divisors is an integer number (3923542).

Almost surely, 2^22420220 is an apocalyptic number.

22420220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22420220 is an abundant number, since it is smaller than the sum of its proper divisors (24662284).

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

22420220 is a wasteful number, since it uses less digits than its factorization.

22420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121020 (or 1121018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22420220 is about 4734.9994720169. Note that the first 3 decimals coincide. The cubic root of 22420220 is about 281.9767430479.

Adding to 22420220 its reverse (2202422), we get a palindrome (24622642).

The spelling of 22420220 in words is "twenty-two million, four hundred twenty thousand, two hundred twenty".