20223033521 has 8 divisors (see below), whose sum is σ = 21105304704. Its totient is φ = 19341013120.

The previous prime is 20223033499. The next prime is 20223033529. The reversal of 20223033521 is 12533032202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20223033521 - 2³⁴ = 3043164337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20223033529) 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, 112556 + ... + 230466.

It is an arithmetic number, because the mean of its divisors is an integer number (2638163088).

Almost surely, 2^20223033521 is an apocalyptic number.

It is an amenable number.

20223033521 is a deficient number, since it is larger than the sum of its proper divisors (882271183).

20223033521 is a wasteful number, since it uses less digits than its factorization.

20223033521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125391.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 20223033521 its reverse (12533032202), we get a palindrome (32756065723).

The spelling of 20223033521 in words is "twenty billion, two hundred twenty-three million, thirty-three thousand, five hundred twenty-one".