20022000000021 has 24 divisors (see below), whose sum is σ = 29075280099840. Its totient is φ = 13276655323200.

The previous prime is 20021999999957. The next prime is 20022000000049. The reversal of 20022000000021 is 12000000022002.

It is not a de Polignac number, because 20022000000021 - 2⁶ = 20021999999957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022000000721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15112050 + ... + 16383468.

It is an arithmetic number, because the mean of its divisors is an integer number (1211470004160).

Almost surely, 2^{20022000000021} is an apocalyptic number.

It is an amenable number.

20022000000021 is a deficient number, since it is larger than the sum of its proper divisors (9053280099819).

20022000000021 is a wasteful number, since it uses less digits than its factorization.

20022000000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280777 (or 1280774 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20022000000021 its reverse (12000000022002), we get a palindrome (32022000022023).

The spelling of 20022000000021 in words is "twenty trillion, twenty-two billion, twenty-one", and thus it is an aban number and an uban number.