20840042708 has 48 divisors (see below), whose sum is σ = 38202388224. Its totient is φ = 9937589760.

The previous prime is 20840042681. The next prime is 20840042719. The reversal of 20840042708 is 80724004802.

It is a congruent number.

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, 3691568 + ... + 3697208.

It is an arithmetic number, because the mean of its divisors is an integer number (795883088).

Almost surely, 2^20840042708 is an apocalyptic number.

It is an amenable number.

20840042708 is a deficient number, since it is larger than the sum of its proper divisors (17362345516).

20840042708 is a wasteful number, since it uses less digits than its factorization.

20840042708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The spelling of 20840042708 in words is "twenty billion, eight hundred forty million, forty-two thousand, seven hundred eight".