20443201 has 2 divisors, whose sum is σ = 20443202. Its totient is φ = 20443200.

The previous prime is 20443141. The next prime is 20443249. The reversal of 20443201 is 10234402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11048976 + 9394225 = 3324^2 + 3065^2 .

It is a cyclic number.

It is not a de Polignac number, because 20443201 - 2¹⁵ = 20410433 is a prime.

It is not a weakly prime, because it can be changed into another prime (20443301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221600 + 10221601.

It is an arithmetic number, because the mean of its divisors is an integer number (10221601).

Almost surely, 2^20443201 is an apocalyptic number.

It is an amenable number.

20443201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443201 is an equidigital number, since it uses as much as digits as its factorization.

20443201 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 16.

The square root of 20443201 is about 4521.4158180818. The cubic root of 20443201 is about 273.4321849808.

Adding to 20443201 its reverse (10234402), we get a palindrome (30677603).

The spelling of 20443201 in words is "twenty million, four hundred forty-three thousand, two hundred one".