20047844 has 24 divisors (see below), whose sum is σ = 36102528. Its totient is φ = 9737280.

The previous prime is 20047823. The next prime is 20047861. The reversal of 20047844 is 44874002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20249 + ... + 21215.

It is an arithmetic number, because the mean of its divisors is an integer number (1504272).

Almost surely, 2^20047844 is an apocalyptic number.

It is an amenable number.

20047844 is a deficient number, since it is larger than the sum of its proper divisors (16054684).

20047844 is a wasteful number, since it uses less digits than its factorization.

20047844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 20047844 is about 4477.4818815937. The cubic root of 20047844 is about 271.6580369539.

The spelling of 20047844 in words is "twenty million, forty-seven thousand, eight hundred forty-four".