20021223300 has 144 divisors (see below), whose sum is σ = 62446211520. Its totient is φ = 4923394560.

The previous prime is 20021223293. The next prime is 20021223307. The reversal of 20021223300 is 332212002.

It is an interprime number because it is at equal distance from previous prime (20021223293) and next prime (20021223307).

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 20021223300.

It is not an unprimeable number, because it can be changed into a prime (20021223307) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5352831 + ... + 5356569.

Almost surely, 2^20021223300 is an apocalyptic number.

20021223300 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 20021223300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31223105760).

20021223300 is an abundant number, since it is smaller than the sum of its proper divisors (42424988220).

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

20021223300 is a wasteful number, since it uses less digits than its factorization.

20021223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142 (or 5135 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20021223300 its reverse (332212002), we get a palindrome (20353435302).

The spelling of 20021223300 in words is "twenty billion, twenty-one million, two hundred twenty-three thousand, three hundred".