20040965760 has 128 divisors (see below), whose sum is σ = 64384358400. Its totient is φ = 5302112256.

The previous prime is 20040965743. The next prime is 20040965767. The reversal of 20040965760 is 6756904002.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (20040965767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202746 + ... + 284934.

It is an arithmetic number, because the mean of its divisors is an integer number (503002800).

Almost surely, 2^20040965760 is an apocalyptic number.

20040965760 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 20040965760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32192179200).

20040965760 is an abundant number, since it is smaller than the sum of its proper divisors (44343392640).

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

20040965760 is a wasteful number, since it uses less digits than its factorization.

20040965760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82338 (or 82326 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 20040965760 in words is "twenty billion, forty million, nine hundred sixty-five thousand, seven hundred sixty".