20355312013424 has 20 divisors (see below), whose sum is σ = 39440304769800. Its totient is φ = 10177168847040.

The previous prime is 20355312013391. The next prime is 20355312013429. The reversal of 20355312013424 is 42431021355302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355312013429) by changing a digit.

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, 30102647 + ... + 30771414.

It is an arithmetic number, because the mean of its divisors is an integer number (1972015238490).

Almost surely, 2^{20355312013424} is an apocalyptic number.

It is an amenable number.

20355312013424 is a deficient number, since it is larger than the sum of its proper divisors (19084992756376).

20355312013424 is a wasteful number, since it uses less digits than its factorization.

20355312013424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60894968 (or 60894962 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 20355312013424 its reverse (42431021355302), we get a palindrome (62786333368726).

The spelling of 20355312013424 in words is "twenty trillion, three hundred fifty-five billion, three hundred twelve million, thirteen thousand, four hundred twenty-four".