20398433 has 8 divisors (see below), whose sum is σ = 22854720. Its totient is φ = 18042480.

The previous prime is 20398409. The next prime is 20398459. The reversal of 20398433 is 33489302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20398433 - 2¹⁰ = 20397409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20398433.

It is not an unprimeable number, because it can be changed into a prime (20398333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24653 + ... + 25466.

It is an arithmetic number, because the mean of its divisors is an integer number (2856840).

Almost surely, 2^20398433 is an apocalyptic number.

It is an amenable number.

20398433 is a deficient number, since it is larger than the sum of its proper divisors (2456287).

20398433 is a wasteful number, since it uses less digits than its factorization.

20398433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50167.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20398433 is about 4516.4624431074. The cubic root of 20398433 is about 273.2324452505.

The spelling of 20398433 in words is "twenty million, three hundred ninety-eight thousand, four hundred thirty-three".