20117625640634 has 8 divisors (see below), whose sum is σ = 30283068986400. Its totient is φ = 10023269311836.

The previous prime is 20117625640579. The next prime is 20117625640669. The reversal of 20117625640634 is 43604652671102.

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

It is a super-2 number, since 2×20117625640634² (a number of 27 digits) contains 22 as substring.

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, 17771753534 + ... + 17771754665.

It is an arithmetic number, because the mean of its divisors is an integer number (3785383623300).

Almost surely, 2^{20117625640634} is an apocalyptic number.

20117625640634 is a deficient number, since it is larger than the sum of its proper divisors (10165443345766).

20117625640634 is a wasteful number, since it uses less digits than its factorization.

20117625640634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35543508484.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 20117625640634 in words is "twenty trillion, one hundred seventeen billion, six hundred twenty-five million, six hundred forty thousand, six hundred thirty-four".