222220020 has 96 divisors (see below), whose sum is σ = 708341760. Its totient is φ = 51525760.

The previous prime is 222220013. The next prime is 222220021. The reversal of 222220020 is 20022222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 222219978 and 222220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7861 + ... + 22499.

It is an arithmetic number, because the mean of its divisors is an integer number (7378560).

Almost surely, 2^222220020 is an apocalyptic number.

222220020 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 222220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354170880).

222220020 is an abundant number, since it is smaller than the sum of its proper divisors (486121740).

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

222220020 is a wasteful number, since it uses less digits than its factorization.

222220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14685 (or 14683 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 222220020 is about 14907.0459850367. The cubic root of 222220020 is about 605.7048634191.

Adding to 222220020 its reverse (20022222), we get a palindrome (242242242).

The spelling of 222220020 in words is "two hundred twenty-two million, two hundred twenty thousand, twenty".