20646602170245 has 48 divisors (see below), whose sum is σ = 36309851165952. Its totient is φ = 10851448798080.

The previous prime is 20646602170199. The next prime is 20646602170277. The reversal of 20646602170245 is 54207120664602.

20646602170245 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 6 + 602 + 17 + 0 + 24 + 5 = 666.

It is not a de Polignac number, because 20646602170245 - 2⁸ = 20646602169989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20646602170245.

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 47 ways as a sum of consecutive naturals, for example, 5479261 + ... + 8444850.

It is an arithmetic number, because the mean of its divisors is an integer number (756455232624).

Almost surely, 2^{20646602170245} is an apocalyptic number.

It is an amenable number.

20646602170245 is a deficient number, since it is larger than the sum of its proper divisors (15663248995707).

20646602170245 is a wasteful number, since it uses less digits than its factorization.

20646602170245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13924602 (or 13924599 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 20646602170245 in words is "twenty trillion, six hundred forty-six billion, six hundred two million, one hundred seventy thousand, two hundred forty-five".