20431535103351 has 48 divisors (see below), whose sum is σ = 30579224832000. Its totient is φ = 13130094297600.

The previous prime is 20431535103313. The next prime is 20431535103361. The reversal of 20431535103351 is 15330153513402.

20431535103351 is a `hidden beast` number, since 2 + 0 + 4 + 31 + 535 + 10 + 33 + 51 = 666.

It is not a de Polignac number, because 20431535103351 - 2²⁹ = 20430998232439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431535103361) 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 47 ways as a sum of consecutive naturals, for example, 410238651 + ... + 410288451.

It is an arithmetic number, because the mean of its divisors is an integer number (637067184000).

Almost surely, 2^{20431535103351} is an apocalyptic number.

20431535103351 is a deficient number, since it is larger than the sum of its proper divisors (10147689728649).

20431535103351 is a wasteful number, since it uses less digits than its factorization.

20431535103351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52344 (or 52341 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

Adding to 20431535103351 its reverse (15330153513402), we get a palindrome (35761688616753).

The spelling of 20431535103351 in words is "twenty trillion, four hundred thirty-one billion, five hundred thirty-five million, one hundred three thousand, three hundred fifty-one".