20687415113 has 8 divisors (see below), whose sum is σ = 21589372800. Its totient is φ = 19785666208.

The previous prime is 20687415109. The next prime is 20687415121. The reversal of 20687415113 is 31151478602.

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

It is a cyclic number.

It is not a de Polignac number, because 20687415113 - 2² = 20687415109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20687415103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170573 + ... + 265461.

It is an arithmetic number, because the mean of its divisors is an integer number (2698671600).

Almost surely, 2^20687415113 is an apocalyptic number.

20687415113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20687415113 is a deficient number, since it is larger than the sum of its proper divisors (901957687).

20687415113 is an equidigital number, since it uses as much as digits as its factorization.

20687415113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104391.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 20687415113 in words is "twenty billion, six hundred eighty-seven million, four hundred fifteen thousand, one hundred thirteen".