20117700124772 has 12 divisors (see below), whose sum is σ = 35208375346620. Its totient is φ = 10058164311456.

The previous prime is 20117700124763. The next prime is 20117700124793. The reversal of 20117700124772 is 27742100771102.

It can be written as a sum of positive squares in 2 ways, for example, as 10056471385636 + 10061228739136 = 3171194^2 + 3171944^2 .

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, 171371723 + ... + 171489074.

It is an arithmetic number, because the mean of its divisors is an integer number (2934031278885).

Almost surely, 2^{20117700124772} is an apocalyptic number.

It is an amenable number.

20117700124772 is a deficient number, since it is larger than the sum of its proper divisors (15090675221848).

20117700124772 is a wasteful number, since it uses less digits than its factorization.

20117700124772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342875470 (or 342875468 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 41.

Adding to 20117700124772 its reverse (27742100771102), we get a palindrome (47859800895874).

The spelling of 20117700124772 in words is "twenty trillion, one hundred seventeen billion, seven hundred million, one hundred twenty-four thousand, seven hundred seventy-two".