20346753566 has 32 divisors (see below), whose sum is σ = 30989426688. Its totient is φ = 10018481760.

The previous prime is 20346753533. The next prime is 20346753571. The reversal of 20346753566 is 66535764302.

It is a super-4 number, since 4×20346753566⁴ (a number of 42 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20346753566.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 36139601 + ... + 36140163.

It is an arithmetic number, because the mean of its divisors is an integer number (968419584).

Almost surely, 2^20346753566 is an apocalyptic number.

20346753566 is a deficient number, since it is larger than the sum of its proper divisors (10642673122).

20346753566 is a wasteful number, since it uses less digits than its factorization.

20346753566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 2721600, while the sum is 47.

The spelling of 20346753566 in words is "twenty billion, three hundred forty-six million, seven hundred fifty-three thousand, five hundred sixty-six".