20240343531 has 64 divisors (see below), whose sum is σ = 32368896000. Its totient is φ = 12454041600.

The previous prime is 20240343527. The next prime is 20240343553. The reversal of 20240343531 is 13534304202.

20240343531 is a `hidden beast` number, since 202 + 403 + 4 + 3 + 53 + 1 = 666.

It is not a de Polignac number, because 20240343531 - 2² = 20240343527 is a prime.

It is a super-2 number, since 2×20240343531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20240343495 and 20240343504.

It is not an unprimeable number, because it can be changed into a prime (20240343631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6483651 + ... + 6486771.

It is an arithmetic number, because the mean of its divisors is an integer number (505764000).

Almost surely, 2^20240343531 is an apocalyptic number.

20240343531 is a deficient number, since it is larger than the sum of its proper divisors (12128552469).

20240343531 is a wasteful number, since it uses less digits than its factorization.

20240343531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20240343531 its reverse (13534304202), we get a palindrome (33774647733).

The spelling of 20240343531 in words is "twenty billion, two hundred forty million, three hundred forty-three thousand, five hundred thirty-one".