20521034131 has 8 divisors (see below), whose sum is σ = 22116632384. Its totient is φ = 18927872640.

The previous prime is 20521034117. The next prime is 20521034153. The reversal of 20521034131 is 13143012502.

It is a happy number.

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 20521034131 - 2¹⁵ = 20521001363 is a prime.

It is a super-2 number, since 2×20521034131² (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 (20521034731) 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, 591675 + ... + 625396.

It is an arithmetic number, because the mean of its divisors is an integer number (2764579048).

Almost surely, 2^20521034131 is an apocalyptic number.

20521034131 is a deficient number, since it is larger than the sum of its proper divisors (1595598253).

20521034131 is a wasteful number, since it uses less digits than its factorization.

20521034131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218381.

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

Adding to 20521034131 its reverse (13143012502), we get a palindrome (33664046633).

The spelling of 20521034131 in words is "twenty billion, five hundred twenty-one million, thirty-four thousand, one hundred thirty-one".