20136071138 has 4 divisors (see below), whose sum is σ = 30204106710. Its totient is φ = 10068035568.

The previous prime is 20136071099. The next prime is 20136071159. The reversal of 20136071138 is 83117063102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10854097489 + 9281973649 = 104183^2 + 96343^2 .

It is a super-2 number, since 2×20136071138² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5034017783 + ... + 5034017786.

Almost surely, 2^20136071138 is an apocalyptic number.

20136071138 is a deficient number, since it is larger than the sum of its proper divisors (10068035572).

20136071138 is a wasteful number, since it uses less digits than its factorization.

20136071138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068035571.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 20136071138 in words is "twenty billion, one hundred thirty-six million, seventy-one thousand, one hundred thirty-eight".