20222004021 has 4 divisors (see below), whose sum is σ = 26962672032. Its totient is φ = 13481336012.

The previous prime is 20222004017. The next prime is 20222004037. The reversal of 20222004021 is 12040022202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20222004021 - 2² = 20222004017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222004071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3370334001 + ... + 3370334006.

It is an arithmetic number, because the mean of its divisors is an integer number (6740668008).

Almost surely, 2^20222004021 is an apocalyptic number.

It is an amenable number.

20222004021 is a deficient number, since it is larger than the sum of its proper divisors (6740668011).

20222004021 is an equidigital number, since it uses as much as digits as its factorization.

20222004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740668010.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20222004021 its reverse (12040022202), we get a palindrome (32262026223).

The spelling of 20222004021 in words is "twenty billion, two hundred twenty-two million, four thousand, twenty-one".