20346263531 has 4 divisors (see below), whose sum is σ = 22195923864. Its totient is φ = 18496603200.

The previous prime is 20346263521. The next prime is 20346263533. The reversal of 20346263531 is 13536264302.

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 20346263531 - 2⁶ = 20346263467 is a prime.

It is a super-2 number, since 2×20346263531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20346263491 and 20346263500.

It is not an unprimeable number, because it can be changed into a prime (20346263533) 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 3 ways as a sum of consecutive naturals, for example, 924830150 + ... + 924830171.

It is an arithmetic number, because the mean of its divisors is an integer number (5548980966).

Almost surely, 2^20346263531 is an apocalyptic number.

20346263531 is a deficient number, since it is larger than the sum of its proper divisors (1849660333).

20346263531 is a wasteful number, since it uses less digits than its factorization.

20346263531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849660332.

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 20346263531 in words is "twenty billion, three hundred forty-six million, two hundred sixty-three thousand, five hundred thirty-one".