20126266443640 has 32 divisors (see below), whose sum is σ = 51753256570080. Its totient is φ = 6900434209152.

The previous prime is 20126266443629. The next prime is 20126266443671. The reversal of 20126266443640 is 4634466262102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35939761227 + ... + 35939761786.

It is an arithmetic number, because the mean of its divisors is an integer number (1617289267815).

Almost surely, 2^{20126266443640} is an apocalyptic number.

20126266443640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20126266443640 is an abundant number, since it is smaller than the sum of its proper divisors (31626990126440).

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

20126266443640 is a wasteful number, since it uses less digits than its factorization.

20126266443640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71879523031 (or 71879523027 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 20126266443640 in words is "twenty trillion, one hundred twenty-six billion, two hundred sixty-six million, four hundred forty-three thousand, six hundred forty".