20355134143450 has 24 divisors (see below), whose sum is σ = 38058772296960. Its totient is φ = 8099425100400.

The previous prime is 20355134143447. The next prime is 20355134143471. The reversal of 20355134143450 is 5434143155302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065704280 + ... + 1065723379.

It is an arithmetic number, because the mean of its divisors is an integer number (1585782179040).

Almost surely, 2^{20355134143450} is an apocalyptic number.

20355134143450 is a deficient number, since it is larger than the sum of its proper divisors (17703638153510).

20355134143450 is a wasteful number, since it uses less digits than its factorization.

20355134143450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131427862 (or 2131427857 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 20355134143450 its reverse (5434143155302), we get a palindrome (25789277298752).

The spelling of 20355134143450 in words is "twenty trillion, three hundred fifty-five billion, one hundred thirty-four million, one hundred forty-three thousand, four hundred fifty".