20685748884235 has 4 divisors (see below), whose sum is σ = 24822898661088. Its totient is φ = 16548599107384.

The previous prime is 20685748884223. The next prime is 20685748884259. The reversal of 20685748884235 is 53248884758602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20685748884235 - 2¹³ = 20685748876043 is a prime.

It is a Duffinian number.

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, 2068574888419 + ... + 2068574888428.

It is an arithmetic number, because the mean of its divisors is an integer number (6205724665272).

Almost surely, 2^{20685748884235} is an apocalyptic number.

20685748884235 is a deficient number, since it is larger than the sum of its proper divisors (4137149776853).

20685748884235 is an equidigital number, since it uses as much as digits as its factorization.

20685748884235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137149776852.

The product of its (nonzero) digits is 825753600, while the sum is 70.

The spelling of 20685748884235 in words is "twenty trillion, six hundred eighty-five billion, seven hundred forty-eight million, eight hundred eighty-four thousand, two hundred thirty-five".