20346320253566 has 32 divisors (see below), whose sum is σ = 32158684229760. Its totient is φ = 9627859021536.

The previous prime is 20346320253559. The next prime is 20346320253587. The reversal of 20346320253566 is 66535202364302.

It is a self number, because there is not a number n which added to its sum of digits gives 20346320253566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267124760 + ... + 267200916.

It is an arithmetic number, because the mean of its divisors is an integer number (1004958882180).

Almost surely, 2^{20346320253566} is an apocalyptic number.

20346320253566 is a deficient number, since it is larger than the sum of its proper divisors (11812363976194).

20346320253566 is a wasteful number, since it uses less digits than its factorization.

20346320253566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83288.

The product of its (nonzero) digits is 4665600, while the sum is 47.

The spelling of 20346320253566 in words is "twenty trillion, three hundred forty-six billion, three hundred twenty million, two hundred fifty-three thousand, five hundred sixty-six".