20132320021 has 8 divisors (see below), whose sum is σ = 21966892704. Its totient is φ = 18298474320.

The previous prime is 20132319997. The next prime is 20132320081. The reversal of 20132320021 is 12002323102.

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 20132320021 - 2³³ = 11542385429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20132319977 and 20132320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132320081) 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, 123010 + ... + 235363.

It is an arithmetic number, because the mean of its divisors is an integer number (2745861588).

Almost surely, 2^20132320021 is an apocalyptic number.

It is an amenable number.

20132320021 is a deficient number, since it is larger than the sum of its proper divisors (1834572683).

20132320021 is a wasteful number, since it uses less digits than its factorization.

20132320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363491.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20132320021 its reverse (12002323102), we get a palindrome (32134643123).

The spelling of 20132320021 in words is "twenty billion, one hundred thirty-two million, three hundred twenty thousand, twenty-one".