20223444021 has 24 divisors (see below), whose sum is σ = 30269404032. Its totient is φ = 11995843200.

The previous prime is 20223443963. The next prime is 20223444037. The reversal of 20223444021 is 12044432202.

It is not a de Polignac number, because 20223444021 - 2⁶ = 20223443957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20223443982 and 20223444000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223440021) 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, 575620 + ... + 609741.

It is an arithmetic number, because the mean of its divisors is an integer number (1261225168).

Almost surely, 2^20223444021 is an apocalyptic number.

It is an amenable number.

20223444021 is a deficient number, since it is larger than the sum of its proper divisors (10045960011).

20223444021 is a wasteful number, since it uses less digits than its factorization.

20223444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185433 (or 1185422 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20223444021 its reverse (12044432202), we get a palindrome (32267876223).

The spelling of 20223444021 in words is "twenty billion, two hundred twenty-three million, four hundred forty-four thousand, twenty-one".