20681847006 has 32 divisors (see below), whose sum is σ = 43385518080. Its totient is φ = 6564907296.

The previous prime is 20681846987. The next prime is 20681847023. The reversal of 20681847006 is 60074818602.

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, 980646 + ... + 1001513.

It is an arithmetic number, because the mean of its divisors is an integer number (1355797440).

Almost surely, 2^20681847006 is an apocalyptic number.

20681847006 is an abundant number, since it is smaller than the sum of its proper divisors (22703671074).

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

20681847006 is a wasteful number, since it uses less digits than its factorization.

20681847006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982248.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 20681847006 in words is "twenty billion, six hundred eighty-one million, eight hundred forty-seven thousand, six".