20525054131 has 4 divisors (see below), whose sum is σ = 20525340672. Its totient is φ = 20524767592.

The previous prime is 20525054129. The next prime is 20525054201. The reversal of 20525054131 is 13145052502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13145052502 = 2 ⋅6572526251.

It is a cyclic number.

It is not a de Polignac number, because 20525054131 - 2¹ = 20525054129 is a prime.

It is a super-2 number, since 2×20525054131² (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 20525054131.

It is not an unprimeable number, because it can be changed into a prime (20525054101) 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, 69966 + ... + 214348.

It is an arithmetic number, because the mean of its divisors is an integer number (5131335168).

Almost surely, 2^20525054131 is an apocalyptic number.

20525054131 is a deficient number, since it is larger than the sum of its proper divisors (286541).

20525054131 is a wasteful number, since it uses less digits than its factorization.

20525054131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286540.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20525054131 in words is "twenty billion, five hundred twenty-five million, fifty-four thousand, one hundred thirty-one".