20126261744477 has 16 divisors (see below), whose sum is σ = 23628411311232. Its totient is φ = 16781064062400.

The previous prime is 20126261744473. The next prime is 20126261744569. The reversal of 20126261744477 is 77444716262102.

It is a cyclic number.

It is not a de Polignac number, because 20126261744477 - 2² = 20126261744473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126261744473) 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, 7576418 + ... + 9882035.

It is an arithmetic number, because the mean of its divisors is an integer number (1476775706952).

Almost surely, 2^{20126261744477} is an apocalyptic number.

It is an amenable number.

20126261744477 is a deficient number, since it is larger than the sum of its proper divisors (3502149566755).

20126261744477 is a wasteful number, since it uses less digits than its factorization.

20126261744477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17462948.

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 20126261744477 in words is "twenty trillion, one hundred twenty-six billion, two hundred sixty-one million, seven hundred forty-four thousand, four hundred seventy-seven".