20244393 has 24 divisors (see below), whose sum is σ = 32864832. Its totient is φ = 11914848.

The previous prime is 20244391. The next prime is 20244397. The reversal of 20244393 is 39344202.

It is a happy number.

It is not a de Polignac number, because 20244393 - 2¹ = 20244391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20244391) 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, 1071 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (1369368).

Almost surely, 2^20244393 is an apocalyptic number.

20244393 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20244393 is a deficient number, since it is larger than the sum of its proper divisors (12620439).

20244393 is a wasteful number, since it uses less digits than its factorization.

20244393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565 (or 7562 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20244393 is about 4499.3769568686. The cubic root of 20244393 is about 272.5429295775.

Adding to 20244393 its reverse (39344202), we get a palindrome (59588595).

The spelling of 20244393 in words is "twenty million, two hundred forty-four thousand, three hundred ninety-three".