20473547757 has 12 divisors (see below), whose sum is σ = 29559442464. Its totient is φ = 12599106000.

The previous prime is 20473547749. The next prime is 20473547813. The reversal of 20473547757 is 75774537402.

It is a happy number.

It is not a de Polignac number, because 20473547757 - 2³ = 20473547749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473547557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20190369 + ... + 20191382.

It is an arithmetic number, because the mean of its divisors is an integer number (2463286872).

Almost surely, 2^20473547757 is an apocalyptic number.

It is an amenable number.

20473547757 is a deficient number, since it is larger than the sum of its proper divisors (9085894707).

20473547757 is a wasteful number, since it uses less digits than its factorization.

20473547757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40381780 (or 40381767 counting only the distinct ones).

The product of its (nonzero) digits is 5762400, while the sum is 51.

The spelling of 20473547757 in words is "twenty billion, four hundred seventy-three million, five hundred forty-seven thousand, seven hundred fifty-seven".