20352221686685 has 32 divisors (see below), whose sum is σ = 28266081926400. Its totient is φ = 13779031242240.

The previous prime is 20352221686631. The next prime is 20352221686691. The reversal of 20352221686685 is 58668612225302.

It is not a de Polignac number, because 20352221686685 - 2⁸ = 20352221686429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20352221686685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2575190 + ... + 6880119.

It is an arithmetic number, because the mean of its divisors is an integer number (883315060200).

Almost surely, 2^{20352221686685} is an apocalyptic number.

It is an amenable number.

20352221686685 is a deficient number, since it is larger than the sum of its proper divisors (7913860239715).

20352221686685 is an equidigital number, since it uses as much as digits as its factorization.

20352221686685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456101.

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 20352221686685 in words is "twenty trillion, three hundred fifty-two billion, two hundred twenty-one million, six hundred eighty-six thousand, six hundred eighty-five".