20040040332040 has 16 divisors (see below), whose sum is σ = 45090090747180. Its totient is φ = 8016016132800.

The previous prime is 20040040332023. The next prime is 20040040332043. The reversal of 20040040332040 is 4023304004002.

It can be written as a sum of positive squares in 2 ways, for example, as 16822745214916 + 3217295117124 = 4101554^2 + 1793682^2 .

It is not an unprimeable number, because it can be changed into a prime (20040040332043) 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, 250500504111 + ... + 250500504190.

Almost surely, 2^{20040040332040} is an apocalyptic number.

20040040332040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20040040332040 is an abundant number, since it is smaller than the sum of its proper divisors (25050050415140).

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

20040040332040 is a wasteful number, since it uses less digits than its factorization.

20040040332040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501001008312 (or 501001008308 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20040040332040 its reverse (4023304004002), we get a palindrome (24063344336042).

The spelling of 20040040332040 in words is "twenty trillion, forty billion, forty million, three hundred thirty-two thousand, forty".