20165738 has 8 divisors (see below), whose sum is σ = 30285732. Its totient is φ = 10070496.

The previous prime is 20165737. The next prime is 20165741. The reversal of 20165738 is 83756102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19035769 + 1129969 = 4363^2 + 1063^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20165737) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3995 + ... + 7502.

Almost surely, 2^20165738 is an apocalyptic number.

20165738 is a deficient number, since it is larger than the sum of its proper divisors (10119994).

20165738 is a wasteful number, since it uses less digits than its factorization.

20165738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12376.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20165738 is about 4490.6277957542. The cubic root of 20165738 is about 272.1895035383.

The spelling of 20165738 in words is "twenty million, one hundred sixty-five thousand, seven hundred thirty-eight".