20121313430 has 32 divisors (see below), whose sum is σ = 36867139200. Its totient is φ = 7905411072.

The previous prime is 20121313409. The next prime is 20121313447. The reversal of 20121313430 is 3431312102.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 86486 + ... + 218454.

It is an arithmetic number, because the mean of its divisors is an integer number (1152098100).

Almost surely, 2^20121313430 is an apocalyptic number.

20121313430 is a deficient number, since it is larger than the sum of its proper divisors (16745825770).

20121313430 is a wasteful number, since it uses less digits than its factorization.

20121313430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132248.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20121313430 its reverse (3431312102), we get a palindrome (23552625532).

The spelling of 20121313430 in words is "twenty billion, one hundred twenty-one million, three hundred thirteen thousand, four hundred thirty".