20052113531 has 2 divisors, whose sum is σ = 20052113532. Its totient is φ = 20052113530.

The previous prime is 20052113491. The next prime is 20052113533. The reversal of 20052113531 is 13531125002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20052113531 is a prime.

It is a super-2 number, since 2×20052113531² (a number of 21 digits) contains 22 as substring.

Together with 20052113533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20052113497 and 20052113506.

It is not a weakly prime, because it can be changed into another prime (20052113533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026056765 + 10026056766.

It is an arithmetic number, because the mean of its divisors is an integer number (10026056766).

Almost surely, 2^20052113531 is an apocalyptic number.

20052113531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20052113531 is an equidigital number, since it uses as much as digits as its factorization.

20052113531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 20052113531 its reverse (13531125002), we get a palindrome (33583238533).

The spelling of 20052113531 in words is "twenty billion, fifty-two million, one hundred thirteen thousand, five hundred thirty-one".