20432140221 has 8 divisors (see below), whose sum is σ = 27243565920. Its totient is φ = 13621070672.

The previous prime is 20432140151. The next prime is 20432140241. The reversal of 20432140221 is 12204123402.

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 20432140221 - 2¹⁵ = 20432107453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432140241) 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, 105631 + ... + 228083.

It is an arithmetic number, because the mean of its divisors is an integer number (3405445740).

Almost surely, 2^20432140221 is an apocalyptic number.

It is an amenable number.

20432140221 is a deficient number, since it is larger than the sum of its proper divisors (6811425699).

20432140221 is a wasteful number, since it uses less digits than its factorization.

20432140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178075.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20432140221 its reverse (12204123402), we get a palindrome (32636263623).

The spelling of 20432140221 in words is "twenty billion, four hundred thirty-two million, one hundred forty thousand, two hundred twenty-one".