20021000202 has 80 divisors (see below), whose sum is σ = 51304410432. Its totient is φ = 5716526400.

The previous prime is 20021000201. The next prime is 20021000267. The reversal of 20021000202 is 20200012002.

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

It is not an unprimeable number, because it can be changed into a prime (20021000201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2037433 + ... + 2047235.

Almost surely, 2^20021000202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021000202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25652205216).

20021000202 is an abundant number, since it is smaller than the sum of its proper divisors (31283410230).

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

20021000202 is a wasteful number, since it uses less digits than its factorization.

20021000202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11625 (or 11616 counting only the distinct ones).

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

Adding to 20021000202 its reverse (20200012002), we get a palindrome (40221012204).

The spelling of 20021000202 in words is "twenty billion, twenty-one million, two hundred two", and thus it is an aban number.