20001021300 has 108 divisors (see below), whose sum is σ = 67514598060. Its totient is φ = 4923325440.

The previous prime is 20001021241. The next prime is 20001021323. The reversal of 20001021300 is 312010002.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7963420644 + 12037600656 = 89238^2 + 109716^2 .

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 843045 + ... + 866444.

Almost surely, 2^20001021300 is an apocalyptic number.

20001021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001021300 is an abundant number, since it is smaller than the sum of its proper divisors (47513576760).

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

20001021300 is a wasteful number, since it uses less digits than its factorization.

20001021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709522 (or 1709512 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20001021300 its reverse (312010002), we get a palindrome (20313031302).

The spelling of 20001021300 in words is "twenty billion, one million, twenty-one thousand, three hundred".