20894736 has 20 divisors (see below), whose sum is σ = 53978192. Its totient is φ = 6964896.

The previous prime is 20894729. The next prime is 20894747. The reversal of 20894736 is 63749802.

It is a junction number, because it is equal to n+sod(n) for n = 20894694 and 20894703.

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 3 ways as a sum of consecutive naturals, for example, 217606 + ... + 217701.

Almost surely, 2^20894736 is an apocalyptic number.

It is an amenable number.

20894736 is an abundant number, since it is smaller than the sum of its proper divisors (33083456).

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

20894736 is a wasteful number, since it uses less digits than its factorization.

20894736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435318 (or 435312 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20894736 is about 4571.0760221200. The cubic root of 20894736 is about 275.4306684429.

The spelling of 20894736 in words is "twenty million, eight hundred ninety-four thousand, seven hundred thirty-six".