20126800040 has 16 divisors (see below), whose sum is σ = 45285300180. Its totient is φ = 8050720000.

The previous prime is 20126800037. The next prime is 20126800121. The reversal of 20126800040 is 4000862102.

It can be written as a sum of positive squares in 2 ways, for example, as 19918805956 + 207994084 = 141134^2 + 14422^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20126799979 and 20126800015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251584961 + ... + 251585040.

Almost surely, 2^20126800040 is an apocalyptic number.

20126800040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20126800040 is an abundant number, since it is smaller than the sum of its proper divisors (25158500140).

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

20126800040 is a wasteful number, since it uses less digits than its factorization.

20126800040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503170012 (or 503170008 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The spelling of 20126800040 in words is "twenty billion, one hundred twenty-six million, eight hundred thousand, forty".