20143415 has 4 divisors (see below), whose sum is σ = 24172104. Its totient is φ = 16114728.

The previous prime is 20143411. The next prime is 20143421. The reversal of 20143415 is 51434102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20143415 - 2² = 20143411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143411) 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, 2014337 + ... + 2014346.

It is an arithmetic number, because the mean of its divisors is an integer number (6043026).

Almost surely, 2^20143415 is an apocalyptic number.

20143415 is a deficient number, since it is larger than the sum of its proper divisors (4028689).

20143415 is an equidigital number, since it uses as much as digits as its factorization.

20143415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028688.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20143415 is about 4488.1415975880. The cubic root of 20143415 is about 272.0890306521.

Adding to 20143415 its reverse (51434102), we get a palindrome (71577517).

The spelling of 20143415 in words is "twenty million, one hundred forty-three thousand, four hundred fifteen".