20433091 has 4 divisors (see below), whose sum is σ = 23352112. Its totient is φ = 17514072.

The previous prime is 20433073. The next prime is 20433097. The reversal of 20433091 is 19033402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20433091 - 2¹¹ = 20431043 is a prime.

It is a super-2 number, since 2×20433091² = 835022415628562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20433097) 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, 1459500 + ... + 1459513.

It is an arithmetic number, because the mean of its divisors is an integer number (5838028).

Almost surely, 2^20433091 is an apocalyptic number.

20433091 is a deficient number, since it is larger than the sum of its proper divisors (2919021).

20433091 is an equidigital number, since it uses as much as digits as its factorization.

20433091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919020.

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

The square root of 20433091 is about 4520.2976671896. The cubic root of 20433091 is about 273.3871030777.

Adding to 20433091 its reverse (19033402), we get a palindrome (39466493).

The spelling of 20433091 in words is "twenty million, four hundred thirty-three thousand, ninety-one".