20144215 has 16 divisors (see below), whose sum is σ = 29752128. Its totient is φ = 12750336.

The previous prime is 20144209. The next prime is 20144219. The reversal of 20144215 is 51244102.

It is a cyclic number.

It is not a de Polignac number, because 20144215 - 2¹⁵ = 20111447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20144192 and 20144201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21682 + ... + 22591.

It is an arithmetic number, because the mean of its divisors is an integer number (1859508).

Almost surely, 2^20144215 is an apocalyptic number.

20144215 is a deficient number, since it is larger than the sum of its proper divisors (9607913).

20144215 is a wasteful number, since it uses less digits than its factorization.

20144215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44298.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20144215 is about 4488.2307204510. The cubic root of 20144215 is about 272.0926326290.

Adding to 20144215 its reverse (51244102), we get a palindrome (71388317).

The spelling of 20144215 in words is "twenty million, one hundred forty-four thousand, two hundred fifteen".