20021002200 has 96 divisors (see below), whose sum is σ = 68961248400. Its totient is φ = 5338932480.

The previous prime is 20021002159. The next prime is 20021002213. The reversal of 20021002200 is 220012002.

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, 1848397 + ... + 1859196.

Almost surely, 2^20021002200 is an apocalyptic number.

20021002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021002200 is an abundant number, since it is smaller than the sum of its proper divisors (48940246200).

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

20021002200 is a wasteful number, since it uses less digits than its factorization.

20021002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707618 (or 3707603 counting only the distinct ones).

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

Adding to 20021002200 its reverse (220012002), we get a palindrome (20241014202).

The spelling of 20021002200 in words is "twenty billion, twenty-one million, two thousand, two hundred".