20804202 has 56 divisors (see below), whose sum is σ = 49316160. Its totient is φ = 6561000.

The previous prime is 20804159. The next prime is 20804257. The reversal of 20804202 is 20240802.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 27327 + ... + 28077.

Almost surely, 2^20804202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20804202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24658080).

20804202 is an abundant number, since it is smaller than the sum of its proper divisors (28511958).

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

20804202 is an equidigital number, since it uses as much as digits as its factorization.

20804202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20804202 is about 4561.1623518573. The cubic root of 20804202 is about 275.0322915249.

The spelling of 20804202 in words is "twenty million, eight hundred four thousand, two hundred two".