20366074643 has 4 divisors (see below), whose sum is σ = 20374503240. Its totient is φ = 20357646048.

The previous prime is 20366074577. The next prime is 20366074693. The reversal of 20366074643 is 34647066302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20366074643 - 2¹⁸ = 20365812499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20366074643.

It is not an unprimeable number, because it can be changed into a prime (20366074693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210673 + ... + 4215506.

It is an arithmetic number, because the mean of its divisors is an integer number (5093625810).

Almost surely, 2^20366074643 is an apocalyptic number.

20366074643 is a deficient number, since it is larger than the sum of its proper divisors (8428597).

20366074643 is an equidigital number, since it uses as much as digits as its factorization.

20366074643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428596.

The product of its (nonzero) digits is 435456, while the sum is 41.

The spelling of 20366074643 in words is "twenty billion, three hundred sixty-six million, seventy-four thousand, six hundred forty-three".