20020001021000 has 128 divisors (see below), whose sum is σ = 48907708761600. Its totient is φ = 7656051884800.

The previous prime is 20020001020951. The next prime is 20020001021047. The reversal of 20020001021000 is 12010002002.

It is a Harshad number since it is a multiple of its sum of digits (8).

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 31 ways as a sum of consecutive naturals, for example, 46683554 + ... + 47110446.

It is an arithmetic number, because the mean of its divisors is an integer number (382091474700).

Almost surely, 2^{20020001021000} is an apocalyptic number.

20020001021000 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 20020001021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24453854380800).

20020001021000 is an abundant number, since it is smaller than the sum of its proper divisors (28887707740600).

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

20020001021000 is a wasteful number, since it uses less digits than its factorization.

20020001021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428976 (or 428962 counting only the distinct ones).

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

Adding to 20020001021000 its reverse (12010002002), we get a palindrome (20032011023002).

The spelling of 20020001021000 in words is "twenty trillion, twenty billion, one million, twenty-one thousand".