20442403481 has 2 divisors, whose sum is σ = 20442403482. Its totient is φ = 20442403480.

The previous prime is 20442403469. The next prime is 20442403529. The reversal of 20442403481 is 18430424402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17197961881 + 3244441600 = 131141^2 + 56960^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442403481 - 2⁶ = 20442403417 is a prime.

It is a super-2 number, since 2×20442403481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20442403441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221201740 + 10221201741.

It is an arithmetic number, because the mean of its divisors is an integer number (10221201741).

Almost surely, 2^20442403481 is an apocalyptic number.

It is an amenable number.

20442403481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442403481 is an equidigital number, since it uses as much as digits as its factorization.

20442403481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 20442403481 its reverse (18430424402), we get a palindrome (38872827883).

The spelling of 20442403481 in words is "twenty billion, four hundred forty-two million, four hundred three thousand, four hundred eighty-one".