20393844 has 24 divisors (see below), whose sum is σ = 49227360. Its totient is φ = 6563424.

The previous prime is 20393839. The next prime is 20393861. The reversal of 20393844 is 44839302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28954 + ... + 29649.

It is an arithmetic number, because the mean of its divisors is an integer number (2051140).

Almost surely, 2^20393844 is an apocalyptic number.

It is an amenable number.

20393844 is an abundant number, since it is smaller than the sum of its proper divisors (28833516).

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

20393844 is a wasteful number, since it uses less digits than its factorization.

20393844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58639 (or 58637 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20393844 is about 4515.9543841806. The cubic root of 20393844 is about 273.2119541711.

The spelling of 20393844 in words is "twenty million, three hundred ninety-three thousand, eight hundred forty-four".