20013731617045 has 8 divisors (see below), whose sum is σ = 24016504945824. Its totient is φ = 16010967290064.

The previous prime is 20013731616961. The next prime is 20013731617049. The reversal of 20013731617045 is 54071613731002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013731617045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013731616989 and 20013731617007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013731617049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4459702 + ... + 7740568.

It is an arithmetic number, because the mean of its divisors is an integer number (3002063118228).

Almost surely, 2^{20013731617045} is an apocalyptic number.

It is an amenable number.

20013731617045 is a deficient number, since it is larger than the sum of its proper divisors (4002773328779).

20013731617045 is a wasteful number, since it uses less digits than its factorization.

20013731617045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500899.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 20013731617045 in words is "twenty trillion, thirteen billion, seven hundred thirty-one million, six hundred seventeen thousand, forty-five".