20433401 has 4 divisors (see below), whose sum is σ = 20521332. Its totient is φ = 20345472.

The previous prime is 20433397. The next prime is 20433403. The reversal of 20433401 is 10433402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 6175225 = 3776^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 20433401 - 2² = 20433397 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 20433401.

It is not an unprimeable number, because it can be changed into a prime (20433403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43616 + ... + 44081.

It is an arithmetic number, because the mean of its divisors is an integer number (5130333).

Almost surely, 2^20433401 is an apocalyptic number.

It is an amenable number.

20433401 is a deficient number, since it is larger than the sum of its proper divisors (87931).

20433401 is an equidigital number, since it uses as much as digits as its factorization.

20433401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87930.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20433401 is about 4520.3319568368. The cubic root of 20433401 is about 273.3884856320.

Adding to 20433401 its reverse (10433402), we get a palindrome (30866803).

Subtracting from 20433401 its reverse (10433402), we obtain a palindrome (9999999).

The spelling of 20433401 in words is "twenty million, four hundred thirty-three thousand, four hundred one".