20321321011100 has 36 divisors (see below), whose sum is σ = 44419144482384. Its totient is φ = 8069196074880.

The previous prime is 20321321011031. The next prime is 20321321011129. The reversal of 20321321011100 is 111012312302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 741640352 + ... + 741667751.

Almost surely, 2^{20321321011100} is an apocalyptic number.

20321321011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321321011100 is an abundant number, since it is smaller than the sum of its proper divisors (24097823471284).

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

20321321011100 is a wasteful number, since it uses less digits than its factorization.

20321321011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483308254 (or 1483308247 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20321321011100 its reverse (111012312302), we get a palindrome (20432333323402).

The spelling of 20321321011100 in words is "twenty trillion, three hundred twenty-one billion, three hundred twenty-one million, eleven thousand, one hundred".