20994486 has 16 divisors (see below), whose sum is σ = 42423024. Its totient is φ = 6925824.

The previous prime is 20994451. The next prime is 20994509. The reversal of 20994486 is 68449902.

It is a congruent number.

It is an unprimeable number.

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, 17455 + ... + 18618.

It is an arithmetic number, because the mean of its divisors is an integer number (2651439).

Almost surely, 2^20994486 is an apocalyptic number.

20994486 is an abundant number, since it is smaller than the sum of its proper divisors (21428538).

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

20994486 is a wasteful number, since it uses less digits than its factorization.

20994486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36175.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 20994486 is about 4581.9740287348. The cubic root of 20994486 is about 275.8682683689.

The spelling of 20994486 in words is "twenty million, nine hundred ninety-four thousand, four hundred eighty-six".