20684444474 has 16 divisors (see below), whose sum is σ = 32112568800. Its totient is φ = 9980610864.

The previous prime is 20684444441. The next prime is 20684444477. The reversal of 20684444474 is 47444448602.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20684444477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29597 + ... + 205535.

It is an arithmetic number, because the mean of its divisors is an integer number (2007035550).

Almost surely, 2^20684444474 is an apocalyptic number.

20684444474 is a deficient number, since it is larger than the sum of its proper divisors (11428124326).

20684444474 is a wasteful number, since it uses less digits than its factorization.

20684444474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177997.

The product of its (nonzero) digits is 2752512, while the sum is 47.

The spelling of 20684444474 in words is "twenty billion, six hundred eighty-four million, four hundred forty-four thousand, four hundred seventy-four".