20352320288757 has 12 divisors (see below), whose sum is σ = 29403898961580. Its totient is φ = 13565396761728.

The previous prime is 20352320288749. The next prime is 20352320288789. The reversal of 20352320288757 is 75788202325302.

It is a happy number.

20352320288757 is a `hidden beast` number, since 2 + 0 + 3 + 523 + 20 + 28 + 8 + 75 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5561111956401 + 14791208332356 = 2358201^2 + 3845934^2 .

It is not a de Polignac number, because 20352320288757 - 2³ = 20352320288749 is a prime.

It is a super-2 number, since 2×20352320288757² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20352320288747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234684582 + ... + 234771287.

It is an arithmetic number, because the mean of its divisors is an integer number (2450324913465).

Almost surely, 2^{20352320288757} is an apocalyptic number.

It is an amenable number.

20352320288757 is a deficient number, since it is larger than the sum of its proper divisors (9051578672823).

20352320288757 is a wasteful number, since it uses less digits than its factorization.

20352320288757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469460692 (or 469460689 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 54.

The spelling of 20352320288757 in words is "twenty trillion, three hundred fifty-two billion, three hundred twenty million, two hundred eighty-eight thousand, seven hundred fifty-seven".