203621012633434 has 16 divisors (see below), whose sum is σ = 336497010980256. Its totient is φ = 91638619546000.

The previous prime is 203621012633419. The next prime is 203621012633447. The reversal of 203621012633434 is 434336210126302.

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 7 ways as a sum of consecutive naturals, for example, 45819307552 + ... + 45819311995.

It is an arithmetic number, because the mean of its divisors is an integer number (21031063186266).

Almost surely, 2^{203621012633434} is an apocalyptic number.

203621012633434 is a deficient number, since it is larger than the sum of its proper divisors (132875998346822).

203621012633434 is a wasteful number, since it uses less digits than its factorization.

203621012633434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91638619661.

The product of its (nonzero) digits is 373248, while the sum is 40.

Adding to 203621012633434 its reverse (434336210126302), we get a palindrome (637957222759736).

The spelling of 203621012633434 in words is "two hundred three trillion, six hundred twenty-one billion, twelve million, six hundred thirty-three thousand, four hundred thirty-four".