20434144 has 12 divisors (see below), whose sum is σ = 40229784. Its totient is φ = 10217056.

The previous prime is 20434109. The next prime is 20434147. The reversal of 20434144 is 44143402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434147) 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 as a sum of consecutive naturals, namely, 319252 + ... + 319315.

It is an arithmetic number, because the mean of its divisors is an integer number (3352482).

Almost surely, 2^20434144 is an apocalyptic number.

It is an amenable number.

20434144 is a deficient number, since it is larger than the sum of its proper divisors (19795640).

20434144 is an equidigital number, since it uses as much as digits as its factorization.

20434144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638577 (or 638569 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 20434144 is about 4520.4141403194. The cubic root of 20434144 is about 273.3917992455.

Adding to 20434144 its reverse (44143402), we get a palindrome (64577546).

The spelling of 20434144 in words is "twenty million, four hundred thirty-four thousand, one hundred forty-four".