20534102131 has 4 divisors (see below), whose sum is σ = 20588282200. Its totient is φ = 20479922064.

The previous prime is 20534102129. The next prime is 20534102153. The reversal of 20534102131 is 13120143502.

It is a happy number.

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 20534102131 - 2¹ = 20534102129 is a prime.

It is a super-2 number, since 2×20534102131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20534103131) 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, 27089466 + ... + 27090223.

It is an arithmetic number, because the mean of its divisors is an integer number (5147070550).

Almost surely, 2^20534102131 is an apocalyptic number.

20534102131 is a deficient number, since it is larger than the sum of its proper divisors (54180069).

20534102131 is an equidigital number, since it uses as much as digits as its factorization.

20534102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54180068.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20534102131 its reverse (13120143502), we get a palindrome (33654245633).

The spelling of 20534102131 in words is "twenty billion, five hundred thirty-four million, one hundred two thousand, one hundred thirty-one".