20211423100 has 144 divisors (see below), whose sum is σ = 48792189600. Its totient is φ = 7205760000.

The previous prime is 20211423091. The next prime is 20211423107. The reversal of 20211423100 is 132411202.

It is a super-2 number, since 2×20211423100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211423107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12109066 + ... + 12110734.

It is an arithmetic number, because the mean of its divisors is an integer number (338834650).

Almost surely, 2^20211423100 is an apocalyptic number.

20211423100 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 20211423100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24396094800).

20211423100 is an abundant number, since it is smaller than the sum of its proper divisors (28580766500).

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

20211423100 is a wasteful number, since it uses less digits than its factorization.

20211423100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20211423100 its reverse (132411202), we get a palindrome (20343834302).

The spelling of 20211423100 in words is "twenty billion, two hundred eleven million, four hundred twenty-three thousand, one hundred".