20126261746450 has 12 divisors (see below), whose sum is σ = 37434846848490. Its totient is φ = 8050504698560.

The previous prime is 20126261746441. The next prime is 20126261746469. The reversal of 20126261746450 is 5464716262102.

It can be written as a sum of positive squares in 3 ways, for example, as 19714940902801 + 411320843649 = 4440151^2 + 641343^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20126261746450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201262617415 + ... + 201262617514.

Almost surely, 2^{20126261746450} is an apocalyptic number.

20126261746450 is a deficient number, since it is larger than the sum of its proper divisors (17308585102040).

20126261746450 is a wasteful number, since it uses less digits than its factorization.

20126261746450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402525234941 (or 402525234936 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20126261746450 in words is "twenty trillion, one hundred twenty-six billion, two hundred sixty-one million, seven hundred forty-six thousand, four hundred fifty".