20021222023 has 4 divisors (see below), whose sum is σ = 21841333128. Its totient is φ = 18201110920.

The previous prime is 20021222017. The next prime is 20021222041. The reversal of 20021222023 is 32022212002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20021222023 - 2⁵ = 20021221991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021221988 and 20021222006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222083) 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, 910055536 + ... + 910055557.

It is an arithmetic number, because the mean of its divisors is an integer number (5460333282).

Almost surely, 2^20021222023 is an apocalyptic number.

20021222023 is a deficient number, since it is larger than the sum of its proper divisors (1820111105).

20021222023 is a wasteful number, since it uses less digits than its factorization.

20021222023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820111104.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20021222023 its reverse (32022212002), we get a palindrome (52043434025).

The spelling of 20021222023 in words is "twenty billion, twenty-one million, two hundred twenty-two thousand, twenty-three".