20244381 has 4 divisors (see below), whose sum is σ = 26992512. Its totient is φ = 13496252.

The previous prime is 20244361. The next prime is 20244383. The reversal of 20244381 is 18344202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20244381 - 2⁶ = 20244317 is a prime.

It is a super-2 number, since 2×20244381² = 819669924146322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244383) 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, 3374061 + ... + 3374066.

It is an arithmetic number, because the mean of its divisors is an integer number (6748128).

Almost surely, 2^20244381 is an apocalyptic number.

It is an amenable number.

20244381 is a deficient number, since it is larger than the sum of its proper divisors (6748131).

20244381 is an equidigital number, since it uses as much as digits as its factorization.

20244381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748130.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20244381 is about 4499.3756233504. The cubic root of 20244381 is about 272.5428757269.

Adding to 20244381 its reverse (18344202), we get a palindrome (38588583).

The spelling of 20244381 in words is "twenty million, two hundred forty-four thousand, three hundred eighty-one".