20136423043431 has 160 divisors (see below), whose sum is σ = 32604078735360. Its totient is φ = 12339081216000.

The previous prime is 20136423043423. The next prime is 20136423043453. The reversal of 20136423043431 is 13434032463102.

It is a happy number.

20136423043431 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 6 + 4 + 2 + 304 + 343 + 1 = 666.

It is not a de Polignac number, because 20136423043431 - 2³ = 20136423043423 is a prime.

It is a super-2 number, since 2×20136423043431² (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 (20136423043531) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 14291286055 + ... + 14291287463.

It is an arithmetic number, because the mean of its divisors is an integer number (203775492096).

Almost surely, 2^{20136423043431} is an apocalyptic number.

20136423043431 is a deficient number, since it is larger than the sum of its proper divisors (12467655691929).

20136423043431 is a wasteful number, since it uses less digits than its factorization.

20136423043431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2778 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 20136423043431 in words is "twenty trillion, one hundred thirty-six billion, four hundred twenty-three million, forty-three thousand, four hundred thirty-one".