20022011100 has 432 divisors, whose sum is σ = 77800020480. Its totient is φ = 4193856000.

The previous prime is 20022011099. The next prime is 20022011101. The reversal of 20022011100 is 111022002.

It is an interprime number because it is at equal distance from previous prime (20022011099) and next prime (20022011101).

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 (20022011101) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12366091 + ... + 12367709.

It is an arithmetic number, because the mean of its divisors is an integer number (180092640).

Almost surely, 2^20022011100 is an apocalyptic number.

20022011100 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 20022011100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38900010240).

20022011100 is an abundant number, since it is smaller than the sum of its proper divisors (57778009380).

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

20022011100 is a wasteful number, since it uses less digits than its factorization.

20022011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20022011100 its reverse (111022002), we get a palindrome (20133033102).

It can be divided in two parts, 2002 and 2011100, that added together give a palindrome (2013102).

The spelling of 20022011100 in words is "twenty billion, twenty-two million, eleven thousand, one hundred".