20213012220 has 48 divisors (see below), whose sum is σ = 56831314848. Its totient is φ = 5367767040.

The previous prime is 20213012203. The next prime is 20213012293. The reversal of 20213012220 is 2221031202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20213012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684469 + ... + 713388.

It is an arithmetic number, because the mean of its divisors is an integer number (1183985726).

Almost surely, 2^20213012220 is an apocalyptic number.

20213012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213012220 is an abundant number, since it is smaller than the sum of its proper divisors (36618302628).

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

20213012220 is a wasteful number, since it uses less digits than its factorization.

20213012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398110 (or 1398108 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20213012220 its reverse (2221031202), we get a palindrome (22434043422).

The spelling of 20213012220 in words is "twenty billion, two hundred thirteen million, twelve thousand, two hundred twenty".