20521524452131 has 8 divisors (see below), whose sum is σ = 20722892484320. Its totient is φ = 20320197380352.

The previous prime is 20521524452071. The next prime is 20521524452161. The reversal of 20521524452131 is 13125442512502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20521524452131 - 2³¹ = 20519376968483 is a prime.

It is a super-2 number, since 2×20521524452131² (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 (20521524452161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9232686 + ... + 11237683.

It is an arithmetic number, because the mean of its divisors is an integer number (2590361560540).

Almost surely, 2^{20521524452131} is an apocalyptic number.

20521524452131 is a deficient number, since it is larger than the sum of its proper divisors (201368032189).

20521524452131 is a wasteful number, since it uses less digits than its factorization.

20521524452131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480205.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 20521524452131 its reverse (13125442512502), we get a palindrome (33646966964633).

The spelling of 20521524452131 in words is "twenty trillion, five hundred twenty-one billion, five hundred twenty-four million, four hundred fifty-two thousand, one hundred thirty-one".