20685748884234 has 64 divisors (see below), whose sum is σ = 49776121436160. Its totient is φ = 5598486486720.

The previous prime is 20685748884223. The next prime is 20685748884259. The reversal of 20685748884234 is 43248884758602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5220027 + ... + 8283729.

It is an arithmetic number, because the mean of its divisors is an integer number (777751897440).

Almost surely, 2^{20685748884234} is an apocalyptic number.

20685748884234 is an abundant number, since it is smaller than the sum of its proper divisors (29090372551926).

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

20685748884234 is a wasteful number, since it uses less digits than its factorization.

20685748884234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072195.

The product of its (nonzero) digits is 660602880, while the sum is 69.

The spelling of 20685748884234 in words is "twenty trillion, six hundred eighty-five billion, seven hundred forty-eight million, eight hundred eighty-four thousand, two hundred thirty-four".