20432444401 has 2 divisors, whose sum is σ = 20432444402. Its totient is φ = 20432444400.

The previous prime is 20432444339. The next prime is 20432444437. The reversal of 20432444401 is 10444423402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14920866801 + 5511577600 = 122151^2 + 74240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432444401 - 2¹³ = 20432436209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20432444401.

It is not a weakly prime, because it can be changed into another prime (20432444801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216222200 + 10216222201.

It is an arithmetic number, because the mean of its divisors is an integer number (10216222201).

Almost surely, 2^20432444401 is an apocalyptic number.

It is an amenable number.

20432444401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432444401 is an equidigital number, since it uses as much as digits as its factorization.

20432444401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20432444401 its reverse (10444423402), we get a palindrome (30876867803).

The spelling of 20432444401 in words is "twenty billion, four hundred thirty-two million, four hundred forty-four thousand, four hundred one".