20252315009 has 8 divisors (see below), whose sum is σ = 20425594728. Its totient is φ = 20079596160.

The previous prime is 20252314987. The next prime is 20252315011. The reversal of 20252315009 is 90051325202.

It can be written as a sum of positive squares in 4 ways, for example, as 1899652225 + 18352662784 = 43585^2 + 135472^2 .

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-20252315009 is a prime.

It is a super-3 number, since 3×20252315009³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20252315609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67532 + ... + 212285.

It is an arithmetic number, because the mean of its divisors is an integer number (2553199341).

Almost surely, 2^20252315009 is an apocalyptic number.

It is an amenable number.

20252315009 is a deficient number, since it is larger than the sum of its proper divisors (173279719).

20252315009 is a wasteful number, since it uses less digits than its factorization.

20252315009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280435.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 20252315009 in words is "twenty billion, two hundred fifty-two million, three hundred fifteen thousand, nine".