20220000 has 120 divisors (see below), whose sum is σ = 66522456. Its totient is φ = 5376000.

The previous prime is 20219951. The next prime is 20220007. The reversal of 20220000 is 2202.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59832 + ... + 60168.

Almost surely, 2^20220000 is an apocalyptic number.

20220000 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 20220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33261228).

20220000 is an abundant number, since it is smaller than the sum of its proper divisors (46302456).

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

20220000 is an equidigital number, since it uses as much as digits as its factorization.

20220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 20220000 is about 4496.6654311834. The cubic root of 20220000 is about 272.4334208748.

Adding to 20220000 its reverse (2202), we get a palindrome (20222202).

It can be divided in two parts, 202 and 20000, that added together give a palindrome (20202).

The spelling of 20220000 in words is "twenty million, two hundred twenty thousand".