20251120513 has 8 divisors (see below), whose sum is σ = 22316083328. Its totient is φ = 18258612624.

The previous prime is 20251120501. The next prime is 20251120541. The reversal of 20251120513 is 31502115202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20251120513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20251126513) 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 7 ways as a sum of consecutive naturals, for example, 18113145 + ... + 18114262.

It is an arithmetic number, because the mean of its divisors is an integer number (2789510416).

Almost surely, 2^20251120513 is an apocalyptic number.

It is an amenable number.

20251120513 is a deficient number, since it is larger than the sum of its proper divisors (2064962815).

20251120513 is a wasteful number, since it uses less digits than its factorization.

20251120513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36227463.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 20251120513 its reverse (31502115202), we get a palindrome (51753235715).

The spelling of 20251120513 in words is "twenty billion, two hundred fifty-one million, one hundred twenty thousand, five hundred thirteen".