20012332100 has 72 divisors (see below), whose sum is σ = 45781736448. Its totient is φ = 7581830400.

The previous prime is 20012332099. The next prime is 20012332111. The reversal of 20012332100 is 123321002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77024 + ... + 214376.

Almost surely, 2^20012332100 is an apocalyptic number.

20012332100 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 20012332100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22890868224).

20012332100 is an abundant number, since it is smaller than the sum of its proper divisors (25769404348).

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

20012332100 is a wasteful number, since it uses less digits than its factorization.

20012332100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137445 (or 137438 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20012332100 its reverse (123321002), we get a palindrome (20135653102).

The spelling of 20012332100 in words is "twenty billion, twelve million, three hundred thirty-two thousand, one hundred".