20446407760 has 20 divisors (see below), whose sum is σ = 47537898228. Its totient is φ = 8178563072.

The previous prime is 20446407749. The next prime is 20446407763. The reversal of 20446407760 is 6770464402.

It can be written as a sum of positive squares in 2 ways, for example, as 4549232704 + 15897175056 = 67448^2 + 126084^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446407763) 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, 127789969 + ... + 127790128.

Almost surely, 2^20446407760 is an apocalyptic number.

20446407760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20446407760 is an abundant number, since it is smaller than the sum of its proper divisors (27091490468).

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

20446407760 is a wasteful number, since it uses less digits than its factorization.

20446407760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255580110 (or 255580104 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 20446407760 in words is "twenty billion, four hundred forty-six million, four hundred seven thousand, seven hundred sixty".