20844130 has 8 divisors (see below), whose sum is σ = 37519452. Its totient is φ = 8337648.

The previous prime is 20844119. The next prime is 20844133. The reversal of 20844130 is 3144802.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 168921 = 4547^2 + 411^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20844133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042197 + ... + 1042216.

Almost surely, 2^20844130 is an apocalyptic number.

20844130 is a deficient number, since it is larger than the sum of its proper divisors (16675322).

20844130 is a wasteful number, since it uses less digits than its factorization.

20844130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084420.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20844130 is about 4565.5372082593. The cubic root of 20844130 is about 275.2081289429.

Adding to 20844130 its reverse (3144802), we get a palindrome (23988932).

The spelling of 20844130 in words is "twenty million, eight hundred forty-four thousand, one hundred thirty".