20433249 has 32 divisors (see below), whose sum is σ = 31363200. Its totient is φ = 13141440.

The previous prime is 20433241. The next prime is 20433263. The reversal of 20433249 is 94233402.

It is a happy number.

It is not a de Polignac number, because 20433249 - 2³ = 20433241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20433241) 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 31 ways as a sum of consecutive naturals, for example, 155914 + ... + 156044.

It is an arithmetic number, because the mean of its divisors is an integer number (980100).

Almost surely, 2^20433249 is an apocalyptic number.

It is an amenable number.

20433249 is a deficient number, since it is larger than the sum of its proper divisors (10929951).

20433249 is a wasteful number, since it uses less digits than its factorization.

20433249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20433249 is about 4520.3151438810. The cubic root of 20433249 is about 273.3878077361.

The spelling of 20433249 in words is "twenty million, four hundred thirty-three thousand, two hundred forty-nine".