20144515 has 8 divisors (see below), whose sum is σ = 24465168. Its totient is φ = 15921120.

The previous prime is 20144497. The next prime is 20144519. The reversal of 20144515 is 51544102.

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

It is not a de Polignac number, because 20144515 - 2⁷ = 20144387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20144519) by changing a digit.

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, 23856 + ... + 24685.

It is an arithmetic number, because the mean of its divisors is an integer number (3058146).

Almost surely, 2^20144515 is an apocalyptic number.

20144515 is a deficient number, since it is larger than the sum of its proper divisors (4320653).

20144515 is an equidigital number, since it uses as much as digits as its factorization.

20144515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48629.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20144515 is about 4488.2641410683. The cubic root of 20144515 is about 272.0939833457.

Adding to 20144515 its reverse (51544102), we get a palindrome (71688617).

The spelling of 20144515 in words is "twenty million, one hundred forty-four thousand, five hundred fifteen".