20423441 has 2 divisors, whose sum is σ = 20423442. Its totient is φ = 20423440.

The previous prime is 20423407. The next prime is 20423449. The reversal of 20423441 is 14432402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 2572816 = 4225^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423441 - 2²² = 16229137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20423449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211720 + 10211721.

It is an arithmetic number, because the mean of its divisors is an integer number (10211721).

Almost surely, 2^20423441 is an apocalyptic number.

It is an amenable number.

20423441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423441 is an equidigital number, since it uses as much as digits as its factorization.

20423441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20423441 is about 4519.2301335515. The cubic root of 20423441 is about 273.3440585057.

Adding to 20423441 its reverse (14432402), we get a palindrome (34855843).

The spelling of 20423441 in words is "twenty million, four hundred twenty-three thousand, four hundred forty-one".