20684274418 has 32 divisors (see below), whose sum is σ = 34609680000. Its totient is φ = 9229207680.

The previous prime is 20684274397. The next prime is 20684274421. The reversal of 20684274418 is 81447248602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183718 + ... + 274081.

It is an arithmetic number, because the mean of its divisors is an integer number (1081552500).

Almost surely, 2^20684274418 is an apocalyptic number.

20684274418 is a deficient number, since it is larger than the sum of its proper divisors (13925405582).

20684274418 is a wasteful number, since it uses less digits than its factorization.

20684274418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457890.

The product of its (nonzero) digits is 688128, while the sum is 46.

The spelling of 20684274418 in words is "twenty billion, six hundred eighty-four million, two hundred seventy-four thousand, four hundred eighteen".