20043149 has 8 divisors (see below), whose sum is σ = 23110080. Its totient is φ = 17027136.

The previous prime is 20043083. The next prime is 20043151. The reversal of 20043149 is 94134002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20043149 - 2¹⁶ = 19977613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20049149) 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 7 ways as a sum of consecutive naturals, for example, 11879 + ... + 13460.

It is an arithmetic number, because the mean of its divisors is an integer number (2888760).

Almost surely, 2^20043149 is an apocalyptic number.

It is an amenable number.

20043149 is a deficient number, since it is larger than the sum of its proper divisors (3066931).

20043149 is a wasteful number, since it uses less digits than its factorization.

20043149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25459.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20043149 is about 4476.9575606655. The cubic root of 20043149 is about 271.6368287870.

The spelling of 20043149 in words is "twenty million, forty-three thousand, one hundred forty-nine".