20222512 has 40 divisors (see below), whose sum is σ = 41559840. Its totient is φ = 9515520.

The previous prime is 20222473. The next prime is 20222557. The reversal of 20222512 is 21522202.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18493 + ... + 19555.

It is an arithmetic number, because the mean of its divisors is an integer number (1038996).

Almost surely, 2^20222512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20222512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20779920).

20222512 is an abundant number, since it is smaller than the sum of its proper divisors (21337328).

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

20222512 is a wasteful number, since it uses less digits than its factorization.

20222512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20222512 is about 4496.9447405989. The cubic root of 20222512 is about 272.4447021873. Note that the first 3 decimals are identical.

Adding to 20222512 its reverse (21522202), we get a palindrome (41744714).

The spelling of 20222512 in words is "twenty million, two hundred twenty-two thousand, five hundred twelve".