20136742067 has 16 divisors (see below), whose sum is σ = 22087296000. Its totient is φ = 18244529184.

The previous prime is 20136742049. The next prime is 20136742099. The reversal of 20136742067 is 76024763102.

It is a cyclic number.

It is not a de Polignac number, because 20136742067 - 2²⁸ = 19868306611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20136742067.

It is not an unprimeable number, because it can be changed into a prime (20136742667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 485534 + ... + 525372.

It is an arithmetic number, because the mean of its divisors is an integer number (1380456000).

Almost surely, 2^20136742067 is an apocalyptic number.

20136742067 is a deficient number, since it is larger than the sum of its proper divisors (1950553933).

20136742067 is a wasteful number, since it uses less digits than its factorization.

20136742067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40570.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 20136742067 in words is "twenty billion, one hundred thirty-six million, seven hundred forty-two thousand, sixty-seven".