20289674 has 8 divisors (see below), whose sum is σ = 30508068. Its totient is φ = 10120320.

The previous prime is 20289667. The next prime is 20289683. The reversal of 20289674 is 47698202.

It can be written as a sum of positive squares in 2 ways, for example, as 19492225 + 797449 = 4415^2 + 893^2 .

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

It is a Curzon number.

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, 11207 + ... + 12890.

Almost surely, 2^20289674 is an apocalyptic number.

20289674 is a deficient number, since it is larger than the sum of its proper divisors (10218394).

20289674 is a wasteful number, since it uses less digits than its factorization.

20289674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24520.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20289674 is about 4504.4060651766. The cubic root of 20289674 is about 272.7459788314.

The spelling of 20289674 in words is "twenty million, two hundred eighty-nine thousand, six hundred seventy-four".