20804610 has 16 divisors (see below), whose sum is σ = 49931136. Its totient is φ = 5547888.

The previous prime is 20804591. The next prime is 20804611. The reversal of 20804610 is 1640802.

It is not an unprimeable number, because it can be changed into a prime (20804611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346714 + ... + 346773.

It is an arithmetic number, because the mean of its divisors is an integer number (3120696).

Almost surely, 2^20804610 is an apocalyptic number.

20804610 is an abundant number, since it is smaller than the sum of its proper divisors (29126526).

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

20804610 is a wasteful number, since it uses less digits than its factorization.

20804610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693497.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20804610 is about 4561.2070770795. The cubic root of 20804610 is about 275.0340894380.

The spelling of 20804610 in words is "twenty million, eight hundred four thousand, six hundred ten".