20801994 has 16 divisors (see below), whose sum is σ = 41675040. Its totient is φ = 6922160.

The previous prime is 20801993. The next prime is 20802011. The reversal of 20801994 is 49910802.

It is not an unprimeable number, because it can be changed into a prime (20801993) 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, 1324 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (2604690).

Almost surely, 2^20801994 is an apocalyptic number.

20801994 is an abundant number, since it is smaller than the sum of its proper divisors (20873046).

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

20801994 is a wasteful number, since it uses less digits than its factorization.

20801994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5925.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20801994 is about 4560.9203018689. The cubic root of 20801994 is about 275.0225612344.

The spelling of 20801994 in words is "twenty million, eight hundred one thousand, nine hundred ninety-four".