20111061565552 has 20 divisors (see below), whose sum is σ = 38965316719096. Its totient is φ = 10055495960640.

The previous prime is 20111061565523. The next prime is 20111061565703. The reversal of 20111061565552 is 25556516011102.

It is a super-2 number, since 2×20111061565552² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 2954902 + ... + 6996682.

Almost surely, 2^{20111061565552} is an apocalyptic number.

It is an amenable number.

20111061565552 is a deficient number, since it is larger than the sum of its proper divisors (18854255153544).

20111061565552 is a wasteful number, since it uses less digits than its factorization.

20111061565552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352776 (or 4352770 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 40.

Adding to 20111061565552 its reverse (25556516011102), we get a palindrome (45667577576654).

The spelling of 20111061565552 in words is "twenty trillion, one hundred eleven billion, sixty-one million, five hundred sixty-five thousand, five hundred fifty-two".