20021020000 has 120 divisors (see below), whose sum is σ = 50954626800. Its totient is φ = 7732032000.

The previous prime is 20021019989. The next prime is 20021020027. The reversal of 20021020000 is 2012002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 562741 + ... + 597259.

It is an arithmetic number, because the mean of its divisors is an integer number (424621890).

Almost surely, 2^20021020000 is an apocalyptic number.

20021020000 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 20021020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25477313400).

20021020000 is an abundant number, since it is smaller than the sum of its proper divisors (30933606800).

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

20021020000 is an equidigital number, since it uses as much as digits as its factorization.

20021020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34578 (or 34555 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 20021020000 its reverse (2012002), we get a palindrome (20023032002).

The spelling of 20021020000 in words is "twenty billion, twenty-one million, twenty thousand".