20513130344 has 16 divisors (see below), whose sum is σ = 43956708000. Its totient is φ = 8791341552.

The previous prime is 20513130329. The next prime is 20513130353. The reversal of 20513130344 is 44303131502.

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, 183152894 + ... + 183153005.

It is an arithmetic number, because the mean of its divisors is an integer number (2747294250).

Almost surely, 2^20513130344 is an apocalyptic number.

It is an amenable number.

20513130344 is an abundant number, since it is smaller than the sum of its proper divisors (23443577656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20513130344 is a wasteful number, since it uses less digits than its factorization.

20513130344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366305912 (or 366305908 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20513130344 its reverse (44303131502), we get a palindrome (64816261846).

The spelling of 20513130344 in words is "twenty billion, five hundred thirteen million, one hundred thirty thousand, three hundred forty-four".