20117700124645 has 8 divisors (see below), whose sum is σ = 25190859286656. Its totient is φ = 15394414008336.

The previous prime is 20117700124589. The next prime is 20117700124663. The reversal of 20117700124645 is 54642100771102.

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 20117700124645 - 2¹⁹ = 20117699600357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20117700124598 and 20117700124607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87468261297 + ... + 87468261526.

It is an arithmetic number, because the mean of its divisors is an integer number (3148857410832).

Almost surely, 2^{20117700124645} is an apocalyptic number.

It is an amenable number.

20117700124645 is a deficient number, since it is larger than the sum of its proper divisors (5073159162011).

20117700124645 is a wasteful number, since it uses less digits than its factorization.

20117700124645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174936522851.

The product of its (nonzero) digits is 94080, while the sum is 40.

Adding to 20117700124645 its reverse (54642100771102), we get a palindrome (74759800895747).

The spelling of 20117700124645 in words is "twenty trillion, one hundred seventeen billion, seven hundred million, one hundred twenty-four thousand, six hundred forty-five".