20109433 has 4 divisors (see below), whose sum is σ = 20127888. Its totient is φ = 20090980.

The previous prime is 20109431. The next prime is 20109451. The reversal of 20109433 is 33490102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20109433 - 2¹ = 20109431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20109431) 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 3 ways as a sum of consecutive naturals, for example, 7483 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (5031972).

Almost surely, 2^20109433 is an apocalyptic number.

It is an amenable number.

20109433 is a deficient number, since it is larger than the sum of its proper divisors (18455).

20109433 is a wasteful number, since it uses less digits than its factorization.

20109433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18454.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20109433 is about 4484.3542455966. The cubic root of 20109433 is about 271.9359395347.

Adding to 20109433 its reverse (33490102), we get a palindrome (53599535).

The spelling of 20109433 in words is "twenty million, one hundred nine thousand, four hundred thirty-three".