20021201002028 has 24 divisors (see below), whose sum is σ = 35129815773360. Its totient is φ = 9984120606720.

The previous prime is 20021201002027. The next prime is 20021201002031. The reversal of 20021201002028 is 82020010212002.

It is a happy number.

It is a super-2 number, since 2×20021201002028² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021201002027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6943043 + ... + 9394053.

It is an arithmetic number, because the mean of its divisors is an integer number (1463742323890).

Almost surely, 2^{20021201002028} is an apocalyptic number.

It is an amenable number.

20021201002028 is a deficient number, since it is larger than the sum of its proper divisors (15108614771332).

20021201002028 is a wasteful number, since it uses less digits than its factorization.

20021201002028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456417 (or 2456415 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The spelling of 20021201002028 in words is "twenty trillion, twenty-one billion, two hundred one million, two thousand, twenty-eight".