1000020220 has 24 divisors (see below), whose sum is σ = 2191349664. Its totient is φ = 382616256.

The previous prime is 1000020209. The next prime is 1000020221. The reversal of 1000020220 is 220200001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086519 + ... + 1087438.

It is an arithmetic number, because the mean of its divisors is an integer number (91306236).

Almost surely, 2^1000020220 is an apocalyptic number.

1000020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000020220 is an abundant number, since it is smaller than the sum of its proper divisors (1191329444).

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

1000020220 is a wasteful number, since it uses less digits than its factorization.

1000020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173989 (or 2173987 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1000020220 is about 31623.0963063391. The cubic root of 1000020220 is about 1000.0067399546.

Adding to 1000020220 its reverse (220200001), we get a palindrome (1220220221).

The spelling of 1000020220 in words is "one billion, twenty thousand, two hundred twenty".