20831304354 has 64 divisors (see below), whose sum is σ = 48848147712. Its totient is φ = 5798016000.

The previous prime is 20831304353. The next prime is 20831304419. The reversal of 20831304354 is 45340313802.

It is not an unprimeable number, because it can be changed into a prime (20831304353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1198494 + ... + 1215750.

It is an arithmetic number, because the mean of its divisors is an integer number (763252308).

Almost surely, 2^20831304354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20831304354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24424073856).

20831304354 is an abundant number, since it is smaller than the sum of its proper divisors (28016843358).

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

20831304354 is a wasteful number, since it uses less digits than its factorization.

20831304354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18011.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20831304354 in words is "twenty billion, eight hundred thirty-one million, three hundred four thousand, three hundred fifty-four".