20804946 has 16 divisors (see below), whose sum is σ = 42112224. Its totient is φ = 6851264.

The previous prime is 20804933. The next prime is 20804947. The reversal of 20804946 is 64940802.

It is not an unprimeable number, because it can be changed into a prime (20804947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20391 + ... + 21386.

It is an arithmetic number, because the mean of its divisors is an integer number (2632014).

Almost surely, 2^20804946 is an apocalyptic number.

20804946 is an abundant number, since it is smaller than the sum of its proper divisors (21307278).

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

20804946 is a wasteful number, since it uses less digits than its factorization.

20804946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41865.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20804946 is about 4561.2439092861. The cubic root of 20804946 is about 275.0355700546.

The spelling of 20804946 in words is "twenty million, eight hundred four thousand, nine hundred forty-six".