20684920270 has 64 divisors (see below), whose sum is σ = 43616563200. Its totient is φ = 7059909024.

The previous prime is 20684920261. The next prime is 20684920309. The reversal of 20684920270 is 7202948602.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 751369 + ... + 778411.

It is an arithmetic number, because the mean of its divisors is an integer number (681508800).

Almost surely, 2^20684920270 is an apocalyptic number.

20684920270 is an abundant number, since it is smaller than the sum of its proper divisors (22931642930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20684920270 is a wasteful number, since it uses less digits than its factorization.

20684920270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27294 (or 27280 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 20684920270 in words is "twenty billion, six hundred eighty-four million, nine hundred twenty thousand, two hundred seventy".