20604834 has 32 divisors (see below), whose sum is σ = 46424640. Its totient is φ = 6772896.

The previous prime is 20604827. The next prime is 20604917. The reversal of 20604834 is 43840602.

20604834 is a `hidden beast` number, since 20 + 604 + 8 + 34 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20604798 and 20604807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1329 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (1450770).

Almost surely, 2^20604834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20604834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23212320).

20604834 is an abundant number, since it is smaller than the sum of its proper divisors (25819806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20604834 is a wasteful number, since it uses less digits than its factorization.

20604834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311 (or 5305 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20604834 is about 4539.2547846535. The cubic root of 20604834 is about 274.1509193979.

The spelling of 20604834 in words is "twenty million, six hundred four thousand, eight hundred thirty-four".