20366535747 has 4 divisors (see below), whose sum is σ = 27155381000. Its totient is φ = 13577690496.

The previous prime is 20366535703. The next prime is 20366535751. The reversal of 20366535747 is 74753566302.

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

It is not a de Polignac number, because 20366535747 - 2¹¹ = 20366533699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20366535696 and 20366535705.

It is not an unprimeable number, because it can be changed into a prime (20366535047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394422622 + ... + 3394422627.

It is an arithmetic number, because the mean of its divisors is an integer number (6788845250).

Almost surely, 2^20366535747 is an apocalyptic number.

20366535747 is a deficient number, since it is larger than the sum of its proper divisors (6788845253).

20366535747 is an equidigital number, since it uses as much as digits as its factorization.

20366535747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788845252.

The product of its (nonzero) digits is 3175200, while the sum is 48.

The spelling of 20366535747 in words is "twenty billion, three hundred sixty-six million, five hundred thirty-five thousand, seven hundred forty-seven".