20523554033131 has 4 divisors (see below), whose sum is σ = 21185604163264. Its totient is φ = 19861503903000.

The previous prime is 20523554033119. The next prime is 20523554033149. The reversal of 20523554033131 is 13133045532502.

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 20523554033131 - 2¹⁵ = 20523554000363 is a prime.

It is a super-2 number, since 2×20523554033131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523554033161) 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, 331025065020 + ... + 331025065081.

It is an arithmetic number, because the mean of its divisors is an integer number (5296401040816).

Almost surely, 2^{20523554033131} is an apocalyptic number.

20523554033131 is a deficient number, since it is larger than the sum of its proper divisors (662050130133).

20523554033131 is an equidigital number, since it uses as much as digits as its factorization.

20523554033131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662050130132.

The product of its (nonzero) digits is 162000, while the sum is 37.

Adding to 20523554033131 its reverse (13133045532502), we get a palindrome (33656599565633).

The spelling of 20523554033131 in words is "twenty trillion, five hundred twenty-three billion, five hundred fifty-four million, thirty-three thousand, one hundred thirty-one".