20681682634 has 8 divisors (see below), whose sum is σ = 31027779360. Its totient is φ = 10339089516.

The previous prime is 20681682569. The next prime is 20681682641. The reversal of 20681682634 is 43628618602.

20681682634 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861094 + ... + 884785.

It is an arithmetic number, because the mean of its divisors is an integer number (3878472420).

Almost surely, 2^20681682634 is an apocalyptic number.

20681682634 is a deficient number, since it is larger than the sum of its proper divisors (10346096726).

20681682634 is a wasteful number, since it uses less digits than its factorization.

20681682634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751804.

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 20681682634 in words is "twenty billion, six hundred eighty-one million, six hundred eighty-two thousand, six hundred thirty-four".