20894424 has 16 divisors (see below), whose sum is σ = 52236120. Its totient is φ = 6964800.

The previous prime is 20894417. The next prime is 20894443. The reversal of 20894424 is 42449802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435277 + ... + 435324.

Almost surely, 2^20894424 is an apocalyptic number.

20894424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20894424 is an abundant number, since it is smaller than the sum of its proper divisors (31341696).

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

20894424 is a wasteful number, since it uses less digits than its factorization.

20894424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870610 (or 870606 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20894424 is about 4571.0418943606. The cubic root of 20894424 is about 275.4292975267.

The spelling of 20894424 in words is "twenty million, eight hundred ninety-four thousand, four hundred twenty-four".