20022002100 has 54 divisors (see below), whose sum is σ = 62757856070. Its totient is φ = 5339200320.

The previous prime is 20022002089. The next prime is 20022002101. The reversal of 20022002100 is 120022002.

It can be written as a sum of positive squares in 3 ways, for example, as 318096 + 20021684004 = 564^2 + 141498^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022002101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11122435 + ... + 11124234.

Almost surely, 2^20022002100 is an apocalyptic number.

20022002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022002100 is an abundant number, since it is smaller than the sum of its proper divisors (42735853970).

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

20022002100 is a wasteful number, since it uses less digits than its factorization.

20022002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22246689 (or 22246679 counting only the distinct ones).

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

Adding to 20022002100 its reverse (120022002), we get a palindrome (20142024102).

The spelling of 20022002100 in words is "twenty billion, twenty-two million, two thousand, one hundred".