20030421 has 8 divisors (see below), whose sum is σ = 26972064. Its totient is φ = 13221200.

The previous prime is 20030411. The next prime is 20030443. The reversal of 20030421 is 12403002.

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 20030421 - 2¹⁰ = 20029397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20030397 and 20030406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030411) 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 7 ways as a sum of consecutive naturals, for example, 32751 + ... + 33356.

It is an arithmetic number, because the mean of its divisors is an integer number (3371508).

Almost surely, 2^20030421 is an apocalyptic number.

It is an amenable number.

20030421 is a deficient number, since it is larger than the sum of its proper divisors (6941643).

20030421 is a wasteful number, since it uses less digits than its factorization.

20030421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66211.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20030421 is about 4475.5358338416. The cubic root of 20030421 is about 271.5793174372.

Adding to 20030421 its reverse (12403002), we get a palindrome (32433423).

The spelling of 20030421 in words is "twenty million, thirty thousand, four hundred twenty-one".