20886444899 has 4 divisors (see below), whose sum is σ = 20934905760. Its totient is φ = 20837984040.

The previous prime is 20886444893. The next prime is 20886444913. The reversal of 20886444899 is 99844468802.

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 20886444899 - 2²⁴ = 20869667683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886444893) 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, 24229784 + ... + 24230645.

It is an arithmetic number, because the mean of its divisors is an integer number (5233726440).

Almost surely, 2^20886444899 is an apocalyptic number.

20886444899 is a deficient number, since it is larger than the sum of its proper divisors (48460861).

20886444899 is an equidigital number, since it uses as much as digits as its factorization.

20886444899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48460860.

The product of its (nonzero) digits is 31850496, while the sum is 62.

The spelling of 20886444899 in words is "twenty billion, eight hundred eighty-six million, four hundred forty-four thousand, eight hundred ninety-nine".