20023132221 has 12 divisors (see below), whose sum is σ = 29855280000. Its totient is φ = 12918149640.

The previous prime is 20023132201. The next prime is 20023132267. The reversal of 20023132221 is 12223132002.

It is not a de Polignac number, because 20023132221 - 2³¹ = 17875648573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20023132194 and 20023132203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023132201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35883471 + ... + 35884028.

It is an arithmetic number, because the mean of its divisors is an integer number (2487940000).

Almost surely, 2^20023132221 is an apocalyptic number.

It is an amenable number.

20023132221 is a deficient number, since it is larger than the sum of its proper divisors (9832147779).

20023132221 is a wasteful number, since it uses less digits than its factorization.

20023132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71767536 (or 71767533 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20023132221 its reverse (12223132002), we get a palindrome (32246264223).

The spelling of 20023132221 in words is "twenty billion, twenty-three million, one hundred thirty-two thousand, two hundred twenty-one".