20020211100 has 108 divisors (see below), whose sum is σ = 65076475464. Its totient is φ = 5338716480.

The previous prime is 20020211093. The next prime is 20020211131. The reversal of 20020211100 is 111202002.

It is a tau number, because it is divible by the number of its divisors (108).

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 35 ways as a sum of consecutive naturals, for example, 387639 + ... + 436238.

It is an arithmetic number, because the mean of its divisors is an integer number (602559958).

Almost surely, 2^20020211100 is an apocalyptic number.

20020211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020211100 is an abundant number, since it is smaller than the sum of its proper divisors (45056264364).

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

20020211100 is a wasteful number, since it uses less digits than its factorization.

20020211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823906 (or 823887 counting only the distinct ones).

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

Adding to 20020211100 its reverse (111202002), we get a palindrome (20131413102).

The spelling of 20020211100 in words is "twenty billion, twenty million, two hundred eleven thousand, one hundred".