21032441 has 2 divisors, whose sum is σ = 21032442. Its totient is φ = 21032440.

The previous prime is 21032437. The next prime is 21032447. The reversal of 21032441 is 14423012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16605625 + 4426816 = 4075^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032441 - 2² = 21032437 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21032447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516220 + 10516221.

It is an arithmetic number, because the mean of its divisors is an integer number (10516221).

Almost surely, 2^21032441 is an apocalyptic number.

It is an amenable number.

21032441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032441 is an equidigital number, since it uses as much as digits as its factorization.

21032441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21032441 is about 4586.1139322961. The cubic root of 21032441 is about 276.0344116234.

Adding to 21032441 its reverse (14423012), we get a palindrome (35455453).

The spelling of 21032441 in words is "twenty-one million, thirty-two thousand, four hundred forty-one".