20884704826 has 4 divisors (see below), whose sum is σ = 31327057242. Its totient is φ = 10442352412.

The previous prime is 20884704823. The next prime is 20884704853. The reversal of 20884704826 is 62840748802.

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

It can be written as a sum of positive squares in only one way, i.e., 15400561801 + 5484143025 = 124099^2 + 74055^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20884704826.

It is not an unprimeable number, because it can be changed into a prime (20884704821) 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 as a sum of consecutive naturals, namely, 5221176205 + ... + 5221176208.

Almost surely, 2^20884704826 is an apocalyptic number.

20884704826 is a deficient number, since it is larger than the sum of its proper divisors (10442352416).

20884704826 is a wasteful number, since it uses less digits than its factorization.

20884704826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442352415.

The product of its (nonzero) digits is 1376256, while the sum is 49.

The spelling of 20884704826 in words is "twenty billion, eight hundred eighty-four million, seven hundred four thousand, eight hundred twenty-six".