20930244 has 12 divisors (see below), whose sum is σ = 48837264. Its totient is φ = 6976744.

The previous prime is 20930243. The next prime is 20930251. The reversal of 20930244 is 44203902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20930244² = 876150227799072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20930243) 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, 872082 + ... + 872105.

It is an arithmetic number, because the mean of its divisors is an integer number (4069772).

Almost surely, 2^20930244 is an apocalyptic number.

It is an amenable number.

20930244 is an abundant number, since it is smaller than the sum of its proper divisors (27907020).

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

20930244 is a wasteful number, since it uses less digits than its factorization.

20930244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744194 (or 1744192 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20930244 is about 4574.9583604662. The cubic root of 20930244 is about 275.5866001800.

The spelling of 20930244 in words is "twenty million, nine hundred thirty thousand, two hundred forty-four".