20152344663 has 72 divisors (see below), whose sum is σ = 33950118384. Its totient is φ = 11470609920.

The previous prime is 20152344643. The next prime is 20152344679. The reversal of 20152344663 is 36644325102.

20152344663 is a `hidden beast` number, since 2 + 0 + 152 + 3 + 446 + 63 = 666.

It is not a de Polignac number, because 20152344663 - 2¹⁰ = 20152343639 is a prime.

It is a super-2 number, since 2×20152344663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152344613) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12088156 + ... + 12089822.

It is an arithmetic number, because the mean of its divisors is an integer number (471529422).

Almost surely, 2^20152344663 is an apocalyptic number.

20152344663 is a deficient number, since it is larger than the sum of its proper divisors (13797773721).

20152344663 is a wasteful number, since it uses less digits than its factorization.

20152344663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 20152344663 its reverse (36644325102), we get a palindrome (56796669765).

The spelling of 20152344663 in words is "twenty billion, one hundred fifty-two million, three hundred forty-four thousand, six hundred sixty-three".