20405230453431 has 40 divisors (see below), whose sum is σ = 32098092048000. Its totient is φ = 12882736426320.

The previous prime is 20405230453339. The next prime is 20405230453441. The reversal of 20405230453431 is 13435403250402.

20405230453431 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 5 + 2 + 304 + 5 + 343 + 1 = 666.

It is not a de Polignac number, because 20405230453431 - 2⁷ = 20405230453303 is a prime.

It is a super-2 number, since 2×20405230453431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405230453441) 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 39 ways as a sum of consecutive naturals, for example, 1697526 + ... + 6609996.

It is an arithmetic number, because the mean of its divisors is an integer number (802452301200).

Almost surely, 2^{20405230453431} is an apocalyptic number.

20405230453431 is a deficient number, since it is larger than the sum of its proper divisors (11692861594569).

20405230453431 is a wasteful number, since it uses less digits than its factorization.

20405230453431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915201 (or 4915192 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 20405230453431 in words is "twenty trillion, four hundred five billion, two hundred thirty million, four hundred fifty-three thousand, four hundred thirty-one".