20144404 has 24 divisors (see below), whose sum is σ = 40860288. Its totient is φ = 8510880.

The previous prime is 20144387. The next prime is 20144417. The reversal of 20144404 is 40444102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3079 + ... + 7054.

It is an arithmetic number, because the mean of its divisors is an integer number (1702512).

Almost surely, 2^20144404 is an apocalyptic number.

It is an amenable number.

20144404 is an abundant number, since it is smaller than the sum of its proper divisors (20715884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20144404 is a wasteful number, since it uses less digits than its factorization.

20144404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215 (or 10213 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 20144404 is about 4488.2517754689. The cubic root of 20144404 is about 272.0934835821.

Adding to 20144404 its reverse (40444102), we get a palindrome (60588506).

The spelling of 20144404 in words is "twenty million, one hundred forty-four thousand, four hundred four".