20051131124355 has 32 divisors (see below), whose sum is σ = 32837537424384. Its totient is φ = 10442173437696.

The previous prime is 20051131124341. The next prime is 20051131124413. The reversal of 20051131124355 is 55342113115002.

It is not a de Polignac number, because 20051131124355 - 2⁹ = 20051131123843 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2364714 + ... + 6759743.

It is an arithmetic number, because the mean of its divisors is an integer number (1026173044512).

Almost surely, 2^{20051131124355} is an apocalyptic number.

20051131124355 is a deficient number, since it is larger than the sum of its proper divisors (12786406300029).

20051131124355 is a wasteful number, since it uses less digits than its factorization.

20051131124355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127915.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 20051131124355 its reverse (55342113115002), we get a palindrome (75393244239357).

The spelling of 20051131124355 in words is "twenty trillion, fifty-one billion, one hundred thirty-one million, one hundred twenty-four thousand, three hundred fifty-five".