20543252434 has 8 divisors (see below), whose sum is σ = 30923766000. Its totient is φ = 10235330436.

The previous prime is 20543252423. The next prime is 20543252449. The reversal of 20543252434 is 43425234502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20543252434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18147184 + ... + 18148315.

It is an arithmetic number, because the mean of its divisors is an integer number (3865470750).

Almost surely, 2^20543252434 is an apocalyptic number.

20543252434 is a deficient number, since it is larger than the sum of its proper divisors (10380513566).

20543252434 is a wasteful number, since it uses less digits than its factorization.

20543252434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36295784.

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 20543252434 its reverse (43425234502), we get a palindrome (63968486936).

The spelling of 20543252434 in words is "twenty billion, five hundred forty-three million, two hundred fifty-two thousand, four hundred thirty-four".