20994568 has 16 divisors (see below), whose sum is σ = 44988480. Its totient is φ = 8997648.

The previous prime is 20994527. The next prime is 20994569. The reversal of 20994568 is 86549902.

It is not an unprimeable number, because it can be changed into a prime (20994569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187396 + ... + 187507.

It is an arithmetic number, because the mean of its divisors is an integer number (2811780).

Almost surely, 2^20994568 is an apocalyptic number.

20994568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20994568 is an abundant number, since it is smaller than the sum of its proper divisors (23993912).

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

20994568 is a wasteful number, since it uses less digits than its factorization.

20994568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374916 (or 374912 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 20994568 is about 4581.9829768344. The cubic root of 20994568 is about 275.8686275294.

The spelling of 20994568 in words is "twenty million, nine hundred ninety-four thousand, five hundred sixty-eight".