20144401 has 4 divisors (see below), whose sum is σ = 20172400. Its totient is φ = 20116404.

The previous prime is 20144387. The next prime is 20144417. The reversal of 20144401 is 10444102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10444102 = 2 ⋅5222051.

It is a cyclic number.

It is not a de Polignac number, because 20144401 - 2⁷ = 20144273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20144461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12891 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (5043100).

Almost surely, 2^20144401 is an apocalyptic number.

It is an amenable number.

20144401 is a deficient number, since it is larger than the sum of its proper divisors (27999).

20144401 is an equidigital number, since it uses as much as digits as its factorization.

20144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27998.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 20144401 is about 4488.2514412631. The cubic root of 20144401 is about 272.0934700749.

Adding to 20144401 its reverse (10444102), we get a palindrome (30588503).

The spelling of 20144401 in words is "twenty million, one hundred forty-four thousand, four hundred one".