20144395 has 8 divisors (see below), whose sum is σ = 24307920. Its totient is φ = 16025760.

The previous prime is 20144387. The next prime is 20144417. The reversal of 20144395 is 59344102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20144395 - 2³ = 20144387 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10225 + ... + 12034.

It is an arithmetic number, because the mean of its divisors is an integer number (3038490).

Almost surely, 2^20144395 is an apocalyptic number.

20144395 is a deficient number, since it is larger than the sum of its proper divisors (4163525).

20144395 is a wasteful number, since it uses less digits than its factorization.

20144395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22445.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20144395 is about 4488.2507728513. The cubic root of 20144395 is about 272.0934430606.

Adding to 20144395 its reverse (59344102), we get a palindrome (79488497).

The spelling of 20144395 in words is "twenty million, one hundred forty-four thousand, three hundred ninety-five".