20530944 has 216 divisors, whose sum is σ = 72275840. Its totient is φ = 5474304.

The previous prime is 20530943. The next prime is 20530969. The reversal of 20530944 is 44903502.

It is a super-2 number, since 2×20530944² = 843039323062272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306399 + ... + 306465.

Almost surely, 2^20530944 is an apocalyptic number.

20530944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36137920).

20530944 is an abundant number, since it is smaller than the sum of its proper divisors (51744896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20530944 is a wasteful number, since it uses less digits than its factorization.

20530944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20530944 is about 4531.1084736519. The cubic root of 20530944 is about 273.8228204346.

The spelling of 20530944 in words is "twenty million, five hundred thirty thousand, nine hundred forty-four".