2004432421 has 2 divisors, whose sum is σ = 2004432422. Its totient is φ = 2004432420.

The previous prime is 2004432383. The next prime is 2004432431. The reversal of 2004432421 is 1242344002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1871860225 + 132572196 = 43265^2 + 11514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2004432421 - 2⁷ = 2004432293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2004432392 and 2004432401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004432431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002216210 + 1002216211.

It is an arithmetic number, because the mean of its divisors is an integer number (1002216211).

Almost surely, 2^2004432421 is an apocalyptic number.

It is an amenable number.

2004432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004432421 is an equidigital number, since it uses as much as digits as its factorization.

2004432421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2004432421 is about 44770.8880970659. Note that the first 3 decimals coincide. The cubic root of 2004432421 is about 1260.8511132475.

Adding to 2004432421 its reverse (1242344002), we get a palindrome (3246776423).

The spelling of 2004432421 in words is "two billion, four million, four hundred thirty-two thousand, four hundred twenty-one".