20000012220 has 72 divisors (see below), whose sum is σ = 61103231280. Its totient is φ = 5294960640.

The previous prime is 20000012203. The next prime is 20000012239. The reversal of 20000012220 is 2221000002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374661 + ... + 424700.

It is an arithmetic number, because the mean of its divisors is an integer number (848655990).

Almost surely, 2^20000012220 is an apocalyptic number.

20000012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000012220 is an abundant number, since it is smaller than the sum of its proper divisors (41103219060).

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

20000012220 is a wasteful number, since it uses less digits than its factorization.

20000012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799515 (or 799510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20000012220 its reverse (2221000002), we get a palindrome (22221012222).

The spelling of 20000012220 in words is "twenty billion, twelve thousand, two hundred twenty".