20535252431 has 16 divisors (see below), whose sum is σ = 20943619200. Its totient is φ = 20131716000.

The previous prime is 20535252389. The next prime is 20535252457. The reversal of 20535252431 is 13425253502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20535252431 is a prime.

It is a super-2 number, since 2×20535252431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535252461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5880596 + ... + 5884086.

It is an arithmetic number, because the mean of its divisors is an integer number (1308976200).

Almost surely, 2^20535252431 is an apocalyptic number.

20535252431 is a deficient number, since it is larger than the sum of its proper divisors (408366769).

20535252431 is a wasteful number, since it uses less digits than its factorization.

20535252431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20535252431 in words is "twenty billion, five hundred thirty-five million, two hundred fifty-two thousand, four hundred thirty-one".