20134221100 has 144 divisors (see below), whose sum is σ = 51240220416. Its totient is φ = 6723360000.

The previous prime is 20134221097. The next prime is 20134221119. The reversal of 20134221100 is 112243102.

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, 13875375 + ... + 13876825.

It is an arithmetic number, because the mean of its divisors is an integer number (355834864).

Almost surely, 2^20134221100 is an apocalyptic number.

20134221100 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 20134221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25620110208).

20134221100 is an abundant number, since it is smaller than the sum of its proper divisors (31105999316).

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

20134221100 is a wasteful number, since it uses less digits than its factorization.

20134221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1969 counting only the distinct ones).

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

Adding to 20134221100 its reverse (112243102), we get a palindrome (20246464202).

The spelling of 20134221100 in words is "twenty billion, one hundred thirty-four million, two hundred twenty-one thousand, one hundred".