20131331322 has 16 divisors (see below), whose sum is σ = 40271137920. Its totient is φ = 6709031232.

The previous prime is 20131331291. The next prime is 20131331327. The reversal of 20131331322 is 22313313102.

It is a super-2 number, since 2×20131331322² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20131331327) 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, 322047 + ... + 379442.

It is an arithmetic number, because the mean of its divisors is an integer number (2516946120).

Almost surely, 2^20131331322 is an apocalyptic number.

20131331322 is an abundant number, since it is smaller than the sum of its proper divisors (20139806598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20131331322 is a wasteful number, since it uses less digits than its factorization.

20131331322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706277.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20131331322 its reverse (22313313102), we get a palindrome (42444644424).

The spelling of 20131331322 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-two".