20137844 has 12 divisors (see below), whose sum is σ = 35511168. Its totient is φ = 9991800.

The previous prime is 20137829. The next prime is 20137849. The reversal of 20137844 is 44873102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20137849) 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, 18692 + ... + 19739.

It is an arithmetic number, because the mean of its divisors is an integer number (2959264).

Almost surely, 2^20137844 is an apocalyptic number.

It is an amenable number.

20137844 is a deficient number, since it is larger than the sum of its proper divisors (15373324).

20137844 is a wasteful number, since it uses less digits than its factorization.

20137844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38566 (or 38564 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20137844 is about 4487.5209191713. The cubic root of 20137844 is about 272.0639447411.

The spelling of 20137844 in words is "twenty million, one hundred thirty-seven thousand, eight hundred forty-four".