20252435131 has 4 divisors (see below), whose sum is σ = 20257194600. Its totient is φ = 20247675664.

The previous prime is 20252435081. The next prime is 20252435183. The reversal of 20252435131 is 13153425202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20252435131 - 2¹⁹ = 20251910843 is a prime.

It is a super-2 number, since 2×20252435131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20252435131.

It is not an unprimeable number, because it can be changed into a prime (20252435831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373346 + ... + 2381863.

It is an arithmetic number, because the mean of its divisors is an integer number (5064298650).

Almost surely, 2^20252435131 is an apocalyptic number.

20252435131 is a deficient number, since it is larger than the sum of its proper divisors (4759469).

20252435131 is an equidigital number, since it uses as much as digits as its factorization.

20252435131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759468.

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

The spelling of 20252435131 in words is "twenty billion, two hundred fifty-two million, four hundred thirty-five thousand, one hundred thirty-one".