21134585 has 16 divisors (see below), whose sum is σ = 27184896. Its totient is φ = 15732288.

The previous prime is 21134573. The next prime is 21134599. The reversal of 21134585 is 58543112.

It is a cyclic number.

It is not a de Polignac number, because 21134585 - 2⁴ = 21134569 is a prime.

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, 1772 + ... + 6738.

It is an arithmetic number, because the mean of its divisors is an integer number (1699056).

Almost surely, 2^21134585 is an apocalyptic number.

It is an amenable number.

21134585 is a deficient number, since it is larger than the sum of its proper divisors (6050311).

21134585 is a wasteful number, since it uses less digits than its factorization.

21134585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032.

The product of its digits is 4800, while the sum is 29.

The square root of 21134585 is about 4597.2366700008. The cubic root of 21134585 is about 276.4805436771.

Adding to 21134585 its reverse (58543112), we get a palindrome (79677697).

The spelling of 21134585 in words is "twenty-one million, one hundred thirty-four thousand, five hundred eighty-five".