20886485650449 has 4 divisors (see below), whose sum is σ = 27848647533936. Its totient is φ = 13924323766964.

The previous prime is 20886485650427. The next prime is 20886485650453. The reversal of 20886485650449 is 94405658468802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20886485650449 - 2³⁶ = 20817766173713 is a prime.

It is a super-2 number, since 2×20886485650449² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20886485690449) 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, 3481080941739 + ... + 3481080941744.

It is an arithmetic number, because the mean of its divisors is an integer number (6962161883484).

Almost surely, 2^{20886485650449} is an apocalyptic number.

It is an amenable number.

20886485650449 is a deficient number, since it is larger than the sum of its proper divisors (6962161883487).

20886485650449 is an equidigital number, since it uses as much as digits as its factorization.

20886485650449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6962161883486.

The product of its (nonzero) digits is 530841600, while the sum is 69.

The spelling of 20886485650449 in words is "twenty trillion, eight hundred eighty-six billion, four hundred eighty-five million, six hundred fifty thousand, four hundred forty-nine".