20132220331 has 4 divisors (see below), whose sum is σ = 20676334432. Its totient is φ = 19588106232.

The previous prime is 20132220323. The next prime is 20132220337. The reversal of 20132220331 is 13302223102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20132220331 - 2³ = 20132220323 is a prime.

It is a super-2 number, since 2×20132220331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20132220299 and 20132220308.

It is not an unprimeable number, because it can be changed into a prime (20132220337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272056995 + ... + 272057068.

It is an arithmetic number, because the mean of its divisors is an integer number (5169083608).

Almost surely, 2^20132220331 is an apocalyptic number.

20132220331 is a deficient number, since it is larger than the sum of its proper divisors (544114101).

20132220331 is an equidigital number, since it uses as much as digits as its factorization.

20132220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544114100.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20132220331 its reverse (13302223102), we get a palindrome (33434443433).

The spelling of 20132220331 in words is "twenty billion, one hundred thirty-two million, two hundred twenty thousand, three hundred thirty-one".