20340433 has 8 divisors (see below), whose sum is σ = 21127680. Its totient is φ = 19561440.

The previous prime is 20340413. The next prime is 20340443. The reversal of 20340433 is 33404302.

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 20340433 - 2⁵ = 20340401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 20340433.

It is not an unprimeable number, because it can be changed into a prime (20340403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3213 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (2640960).

Almost surely, 2^20340433 is an apocalyptic number.

It is an amenable number.

20340433 is a deficient number, since it is larger than the sum of its proper divisors (787247).

20340433 is a wasteful number, since it uses less digits than its factorization.

20340433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 20340433 is about 4510.0369178090. The cubic root of 20340433 is about 272.9732337446.

Adding to 20340433 its reverse (33404302), we get a palindrome (53744735).

The spelling of 20340433 in words is "twenty million, three hundred forty thousand, four hundred thirty-three".