20964330520 has 96 divisors (see below), whose sum is σ = 54916444800. Its totient is φ = 7181809152.

The previous prime is 20964330511. The next prime is 20964330539. The reversal of 20964330520 is 2503346902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2816724 + ... + 2824156.

It is an arithmetic number, because the mean of its divisors is an integer number (572046300).

Almost surely, 2^20964330520 is an apocalyptic number.

20964330520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20964330520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27458222400).

20964330520 is an abundant number, since it is smaller than the sum of its proper divisors (33952114280).

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

20964330520 is a wasteful number, since it uses less digits than its factorization.

20964330520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897 (or 8886 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 20964330520 in words is "twenty billion, nine hundred sixty-four million, three hundred thirty thousand, five hundred twenty".