20233421 has 8 divisors (see below), whose sum is σ = 22493184. Its totient is φ = 18074160.

The previous prime is 20233363. The next prime is 20233427. The reversal of 20233421 is 12433202.

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

It is a de Polignac number, because none of the positive numbers 2^k-20233421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20233421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233427) 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, 24701 + ... + 25506.

It is an arithmetic number, because the mean of its divisors is an integer number (2811648).

Almost surely, 2^20233421 is an apocalyptic number.

It is an amenable number.

20233421 is a deficient number, since it is larger than the sum of its proper divisors (2259763).

20233421 is a wasteful number, since it uses less digits than its factorization.

20233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50251.

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

The square root of 20233421 is about 4498.1575116930. The cubic root of 20233421 is about 272.4936833258.

Adding to 20233421 its reverse (12433202), we get a palindrome (32666623).

The spelling of 20233421 in words is "twenty million, two hundred thirty-three thousand, four hundred twenty-one".