20442103453 has 2 divisors, whose sum is σ = 20442103454. Its totient is φ = 20442103452.

The previous prime is 20442103391. The next prime is 20442103457. The reversal of 20442103453 is 35430124402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12873625444 + 7568478009 = 113462^2 + 86997^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442103453 - 2¹⁷ = 20441972381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442103457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221051726 + 10221051727.

It is an arithmetic number, because the mean of its divisors is an integer number (10221051727).

Almost surely, 2^20442103453 is an apocalyptic number.

It is an amenable number.

20442103453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442103453 is an equidigital number, since it uses as much as digits as its factorization.

20442103453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20442103453 its reverse (35430124402), we get a palindrome (55872227855).

The spelling of 20442103453 in words is "twenty billion, four hundred forty-two million, one hundred three thousand, four hundred fifty-three".