20022021220 has 24 divisors (see below), whose sum is σ = 42112905408. Its totient is φ = 7996111200.

The previous prime is 20022021211. The next prime is 20022021241. The reversal of 20022021220 is 2212022002.

It is a self number, because there is not a number n which added to its sum of digits gives 20022021220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780646 + ... + 805885.

It is an arithmetic number, because the mean of its divisors is an integer number (1754704392).

Almost surely, 2^20022021220 is an apocalyptic number.

20022021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022021220 is an abundant number, since it is smaller than the sum of its proper divisors (22090884188).

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

20022021220 is a wasteful number, since it uses less digits than its factorization.

20022021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587171 (or 1587169 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20022021220 its reverse (2212022002), we get a palindrome (22234043222).

The spelling of 20022021220 in words is "twenty billion, twenty-two million, twenty-one thousand, two hundred twenty".