20313144 has 24 divisors (see below), whose sum is σ = 55014960. Its totient is φ = 6771024.

The previous prime is 20313143. The next prime is 20313197. The reversal of 20313144 is 44131302.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313143) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 140992 + ... + 141135.

It is an arithmetic number, because the mean of its divisors is an integer number (2292290).

Almost surely, 2^20313144 is an apocalyptic number.

20313144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20313144 is an abundant number, since it is smaller than the sum of its proper divisors (34701816).

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

20313144 is a wasteful number, since it uses less digits than its factorization.

20313144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282139 (or 282132 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20313144 is about 4507.0105391490. The cubic root of 20313144 is about 272.8511042508.

Adding to 20313144 its reverse (44131302), we get a palindrome (64444446).

The spelling of 20313144 in words is "twenty million, three hundred thirteen thousand, one hundred forty-four".