20565145124532 has 36 divisors (see below), whose sum is σ = 52274530919520. Its totient is φ = 6816752013072.

The previous prime is 20565145124521. The next prime is 20565145124561. The reversal of 20565145124532 is 23542154156502.

20565145124532 is a `hidden beast` number, since 2 + 0 + 5 + 6 + 51 + 45 + 1 + 24 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-4 number, since 4×20565145124532⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1595675208 + ... + 1595688095.

It is an arithmetic number, because the mean of its divisors is an integer number (1452070303320).

Almost surely, 2^{20565145124532} is an apocalyptic number.

It is an amenable number.

20565145124532 is an abundant number, since it is smaller than the sum of its proper divisors (31709385794988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20565145124532 is a wasteful number, since it uses less digits than its factorization.

20565145124532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191363492 (or 3191363487 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

The spelling of 20565145124532 in words is "twenty trillion, five hundred sixty-five billion, one hundred forty-five million, one hundred twenty-four thousand, five hundred thirty-two".