20230421 has 8 divisors (see below), whose sum is σ = 21379200. Its totient is φ = 19090080.

The previous prime is 20230411. The next prime is 20230433. The reversal of 20230421 is 12403202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20230421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20230396 and 20230405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 7113.

It is an arithmetic number, because the mean of its divisors is an integer number (2672400).

Almost surely, 2^20230421 is an apocalyptic number.

It is an amenable number.

20230421 is a deficient number, since it is larger than the sum of its proper divisors (1148779).

20230421 is a wasteful number, since it uses less digits than its factorization.

20230421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4219.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20230421 is about 4497.8240294614. The cubic root of 20230421 is about 272.4802151559.

Adding to 20230421 its reverse (12403202), we get a palindrome (32633623).

The spelling of 20230421 in words is "twenty million, two hundred thirty thousand, four hundred twenty-one".