20710134040 has 64 divisors (see below), whose sum is σ = 48258524160. Its totient is φ = 7990565760.

The previous prime is 20710134023. The next prime is 20710134047. The reversal of 20710134040 is 4043101702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710134047) 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, 353479 + ... + 407881.

It is an arithmetic number, because the mean of its divisors is an integer number (754039440).

Almost surely, 2^20710134040 is an apocalyptic number.

20710134040 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 20710134040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24129262080).

20710134040 is an abundant number, since it is smaller than the sum of its proper divisors (27548390120).

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

20710134040 is a wasteful number, since it uses less digits than its factorization.

20710134040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54752 (or 54748 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 20710134040 its reverse (4043101702), we get a palindrome (24753235742).

The spelling of 20710134040 in words is "twenty billion, seven hundred ten million, one hundred thirty-four thousand, forty".