20464660000 has 120 divisors (see below), whose sum is σ = 50916248460. Its totient is φ = 8093184000.

The previous prime is 20464659977. The next prime is 20464660037. The reversal of 20464660000 is 6646402.

It can be written as a sum of positive squares in 10 ways, for example, as 3094474384 + 17370185616 = 55628^2 + 131796^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1774252 + ... + 1785748.

Almost surely, 2^20464660000 is an apocalyptic number.

20464660000 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 20464660000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25458124230).

20464660000 is an abundant number, since it is smaller than the sum of its proper divisors (30451588460).

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

20464660000 is an equidigital number, since it uses as much as digits as its factorization.

20464660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616 (or 11593 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 20464660000 in words is "twenty billion, four hundred sixty-four million, six hundred sixty thousand".