20002021200 has 240 divisors, whose sum is σ = 81363026560. Its totient is φ = 4571873280.

The previous prime is 20002021189. The next prime is 20002021261. The reversal of 20002021200 is 212020002.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56689 + ... + 207888.

Almost surely, 2^20002021200 is an apocalyptic number.

20002021200 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 20002021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40681513280).

20002021200 is an abundant number, since it is smaller than the sum of its proper divisors (61361005360).

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

20002021200 is a wasteful number, since it uses less digits than its factorization.

20002021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264611 (or 264594 counting only the distinct ones).

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

Adding to 20002021200 its reverse (212020002), we get a palindrome (20214041202).

The spelling of 20002021200 in words is "twenty billion, two million, twenty-one thousand, two hundred".