20136938 has 4 divisors (see below), whose sum is σ = 30205410. Its totient is φ = 10068468.

The previous prime is 20136913. The next prime is 20136953. The reversal of 20136938 is 83963102.

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., 11744329 + 8392609 = 3427^2 + 2897^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5034233 + ... + 5034236.

Almost surely, 2^20136938 is an apocalyptic number.

20136938 is a deficient number, since it is larger than the sum of its proper divisors (10068472).

20136938 is a wasteful number, since it uses less digits than its factorization.

20136938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068471.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20136938 is about 4487.4199714312. The cubic root of 20136938 is about 272.0598646348.

The spelling of 20136938 in words is "twenty million, one hundred thirty-six thousand, nine hundred thirty-eight".