20173444 has 12 divisors (see below), whose sum is σ = 36521100. Its totient is φ = 9738848.

The previous prime is 20173427. The next prime is 20173453. The reversal of 20173444 is 44437102.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 15507844 = 2160^2 + 3938^2 .

It is a super-2 number, since 2×20173444² = 813935685642272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86839 + ... + 87070.

It is an arithmetic number, because the mean of its divisors is an integer number (3043425).

Almost surely, 2^20173444 is an apocalyptic number.

It is an amenable number.

20173444 is a deficient number, since it is larger than the sum of its proper divisors (16347656).

20173444 is a wasteful number, since it uses less digits than its factorization.

20173444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173942 (or 173940 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20173444 is about 4491.4857230097. The cubic root of 20173444 is about 272.2241700140.

The spelling of 20173444 in words is "twenty million, one hundred seventy-three thousand, four hundred forty-four".