20136543460042 has 8 divisors (see below), whose sum is σ = 30204961380036. Its totient is φ = 10068223000032.

The previous prime is 20136543460027. The next prime is 20136543460051. The reversal of 20136543460042 is 24006434563102.

It can be written as a sum of positive squares in 2 ways, for example, as 19776974131161 + 359569328881 = 4447131^2 + 599641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20136543459977 and 20136543460004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23846253 + ... + 24676240.

Almost surely, 2^{20136543460042} is an apocalyptic number.

20136543460042 is a deficient number, since it is larger than the sum of its proper divisors (10068417919994).

20136543460042 is a wasteful number, since it uses less digits than its factorization.

20136543460042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48729992.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 20136543460042 in words is "twenty trillion, one hundred thirty-six billion, five hundred forty-three million, four hundred sixty thousand, forty-two".