20022020100 has 144 divisors (see below), whose sum is σ = 64532675200. Its totient is φ = 5325471360.

The previous prime is 20022020059. The next prime is 20022020111. The reversal of 20022020100 is 102022002.

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

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, 1062561 + ... + 1081239.

Almost surely, 2^20022020100 is an apocalyptic number.

20022020100 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 20022020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32266337600).

20022020100 is an abundant number, since it is smaller than the sum of its proper divisors (44510655100).

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

20022020100 is a wasteful number, since it uses less digits than its factorization.

20022020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19099 (or 19086 counting only the distinct ones).

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

Adding to 20022020100 its reverse (102022002), we get a palindrome (20124042102).

The spelling of 20022020100 in words is "twenty billion, twenty-two million, twenty thousand, one hundred".