20540570008 has 128 divisors (see below), whose sum is σ = 49520678400. Its totient is φ = 7775115264.

The previous prime is 20540569997. The next prime is 20540570009. The reversal of 20540570008 is 80007504502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540570009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1930110 + ... + 1940722.

It is an arithmetic number, because the mean of its divisors is an integer number (386880300).

Almost surely, 2^20540570008 is an apocalyptic number.

20540570008 is a gapful number since it is divisible by the number (28) 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 20540570008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24760339200).

20540570008 is an abundant number, since it is smaller than the sum of its proper divisors (28980108392).

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

20540570008 is a wasteful number, since it uses less digits than its factorization.

20540570008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10769 (or 10765 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 20540570008 in words is "twenty billion, five hundred forty million, five hundred seventy thousand, eight".