20585415 has 16 divisors (see below), whose sum is σ = 33429888. Its totient is φ = 10814496.

The previous prime is 20585399. The next prime is 20585429. The reversal of 20585415 is 51458502.

It is not a de Polignac number, because 20585415 - 2⁴ = 20585399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9237 + ... + 11246.

It is an arithmetic number, because the mean of its divisors is an integer number (2089368).

Almost surely, 2^20585415 is an apocalyptic number.

20585415 is a deficient number, since it is larger than the sum of its proper divisors (12844473).

20585415 is a wasteful number, since it uses less digits than its factorization.

20585415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20558.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 20585415 is about 4537.1152729460. The cubic root of 20585415 is about 274.0647679309.

The spelling of 20585415 in words is "twenty million, five hundred eighty-five thousand, four hundred fifteen".