20163738 has 32 divisors (see below), whose sum is σ = 46341504. Its totient is φ = 5729472.

The previous prime is 20163707. The next prime is 20163739. The reversal of 20163738 is 83736102.

It is not an unprimeable number, because it can be changed into a prime (20163739) 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 15 ways as a sum of consecutive naturals, for example, 7056 + ... + 9492.

It is an arithmetic number, because the mean of its divisors is an integer number (1448172).

Almost surely, 2^20163738 is an apocalyptic number.

20163738 is an abundant number, since it is smaller than the sum of its proper divisors (26177766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20163738 is a wasteful number, since it uses less digits than its factorization.

20163738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20163738 is about 4490.4051042194. The cubic root of 20163738 is about 272.1805048263.

The spelling of 20163738 in words is "twenty million, one hundred sixty-three thousand, seven hundred thirty-eight".