20843672 has 16 divisors (see below), whose sum is σ = 39382200. Its totient is φ = 10341760.

The previous prime is 20843671. The next prime is 20843677. The reversal of 20843672 is 27634802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20843671) by changing a digit.

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, 8897 + ... + 10992.

Almost surely, 2^20843672 is an apocalyptic number.

It is an amenable number.

20843672 is a deficient number, since it is larger than the sum of its proper divisors (18538528).

20843672 is a wasteful number, since it uses less digits than its factorization.

20843672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20026 (or 20022 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20843672 is about 4565.4870495928. The cubic root of 20843672 is about 275.2061132476.

The spelling of 20843672 in words is "twenty million, eight hundred forty-three thousand, six hundred seventy-two".