20144423401 has 2 divisors, whose sum is σ = 20144423402. Its totient is φ = 20144423400.

The previous prime is 20144423399. The next prime is 20144423483. The reversal of 20144423401 is 10432444102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11262303376 + 8882120025 = 106124^2 + 94245^2 .

It is a cyclic number.

It is not a de Polignac number, because 20144423401 - 2¹ = 20144423399 is a prime.

Together with 20144423399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20144423501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072211700 + 10072211701.

It is an arithmetic number, because the mean of its divisors is an integer number (10072211701).

Almost surely, 2^20144423401 is an apocalyptic number.

It is an amenable number.

20144423401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144423401 is an equidigital number, since it uses as much as digits as its factorization.

20144423401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20144423401 its reverse (10432444102), we get a palindrome (30576867503).

The spelling of 20144423401 in words is "twenty billion, one hundred forty-four million, four hundred twenty-three thousand, four hundred one".