20366621022645 has 32 divisors (see below), whose sum is σ = 36369691008000. Its totient is φ = 10813488455232.

The previous prime is 20366621022607. The next prime is 20366621022697. The reversal of 20366621022645 is 54622012666302.

It is not a de Polignac number, because 20366621022645 - 2¹¹ = 20366621020597 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 20366621022645.

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 31 ways as a sum of consecutive naturals, for example, 338229670 + ... + 338289879.

It is an arithmetic number, because the mean of its divisors is an integer number (1136552844000).

Almost surely, 2^{20366621022645} is an apocalyptic number.

It is an amenable number.

20366621022645 is a deficient number, since it is larger than the sum of its proper divisors (16003069985355).

20366621022645 is a wasteful number, since it uses less digits than its factorization.

20366621022645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676519786 (or 676519780 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

Adding to 20366621022645 its reverse (54622012666302), we get a palindrome (74988633688947).

The spelling of 20366621022645 in words is "twenty trillion, three hundred sixty-six billion, six hundred twenty-one million, twenty-two thousand, six hundred forty-five".