20252431513 has 8 divisors (see below), whose sum is σ = 20390904576. Its totient is φ = 20114016000.

The previous prime is 20252431421. The next prime is 20252431559. The reversal of 20252431513 is 31513425202.

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

It is a cyclic number.

It is not a de Polignac number, because 20252431513 - 2²¹ = 20250334361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20252431813) 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, 879993 + ... + 902713.

It is an arithmetic number, because the mean of its divisors is an integer number (2548863072).

Almost surely, 2^20252431513 is an apocalyptic number.

It is an amenable number.

20252431513 is a deficient number, since it is larger than the sum of its proper divisors (138473063).

20252431513 is a wasteful number, since it uses less digits than its factorization.

20252431513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28775.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20252431513 its reverse (31513425202), we get a palindrome (51765856715).

The spelling of 20252431513 in words is "twenty billion, two hundred fifty-two million, four hundred thirty-one thousand, five hundred thirteen".