20201122734664 has 16 divisors (see below), whose sum is σ = 37877336402220. Its totient is φ = 10100499694080.

The previous prime is 20201122734623. The next prime is 20201122734679. The reversal of 20201122734664 is 46643722110202.

It can be written as a sum of positive squares in 2 ways, for example, as 19571864480100 + 629258254564 = 4424010^2 + 793258^2 .

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, 6301957 + ... + 8950804.

Almost surely, 2^{20201122734664} is an apocalyptic number.

It is an amenable number.

20201122734664 is a deficient number, since it is larger than the sum of its proper divisors (17676213667556).

20201122734664 is a wasteful number, since it uses less digits than its factorization.

20201122734664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418320 (or 15418316 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

Adding to 20201122734664 its reverse (46643722110202), we get a palindrome (66844844844866).

The spelling of 20201122734664 in words is "twenty trillion, two hundred one billion, one hundred twenty-two million, seven hundred thirty-four thousand, six hundred sixty-four".