22012020 has 48 divisors (see below), whose sum is σ = 68483520. Its totient is φ = 5869728.

The previous prime is 22012019. The next prime is 22012031. The reversal of 22012020 is 2021022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22011993 and 22012011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19842 + ... + 20921.

It is an arithmetic number, because the mean of its divisors is an integer number (1426740).

Almost surely, 2^22012020 is an apocalyptic number.

22012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012020 is an abundant number, since it is smaller than the sum of its proper divisors (46471500).

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

22012020 is a wasteful number, since it uses less digits than its factorization.

22012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40781 (or 40773 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22012020 is about 4691.6969211576. The cubic root of 22012020 is about 280.2549548544.

Adding to 22012020 its reverse (2021022), we get a palindrome (24033042).

The spelling of 22012020 in words is "twenty-two million, twelve thousand, twenty".