20131244 has 12 divisors (see below), whose sum is σ = 40262544. Its totient is φ = 8627664.

The previous prime is 20131229. The next prime is 20131259. The reversal of 20131244 is 44213102.

It is an interprime number because it is at equal distance from previous prime (20131229) and next prime (20131259).

20131244 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359459 + ... + 359514.

It is an arithmetic number, because the mean of its divisors is an integer number (3355212).

Almost surely, 2^20131244 is an apocalyptic number.

It is an amenable number.

20131244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20131244 is a wasteful number, since it uses less digits than its factorization.

20131244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718984 (or 718982 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20131244 is about 4486.7854862919. The cubic root of 20131244 is about 272.0342193107.

Adding to 20131244 its reverse (44213102), we get a palindrome (64344346).

The spelling of 20131244 in words is "twenty million, one hundred thirty-one thousand, two hundred forty-four".