20842415 has 8 divisors (see below), whose sum is σ = 27284688. Its totient is φ = 15158080.

The previous prime is 20842397. The next prime is 20842421. The reversal of 20842415 is 51424802.

It is a happy number.

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

It is not a de Polignac number, because 20842415 - 2¹⁰ = 20841391 is a prime.

It is a Duffinian number.

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, 189422 + ... + 189531.

It is an arithmetic number, because the mean of its divisors is an integer number (3410586).

Almost surely, 2^20842415 is an apocalyptic number.

20842415 is a deficient number, since it is larger than the sum of its proper divisors (6442273).

20842415 is a wasteful number, since it uses less digits than its factorization.

20842415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378969.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 20842415 is about 4565.3493842202. The cubic root of 20842415 is about 275.2005809364.

The spelling of 20842415 in words is "twenty million, eight hundred forty-two thousand, four hundred fifteen".