20727418 has 8 divisors (see below), whose sum is σ = 31117248. Its totient is φ = 10355004.

The previous prime is 20727409. The next prime is 20727433. The reversal of 20727418 is 81472702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20727418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (3889656).

Almost surely, 2^20727418 is an apocalyptic number.

20727418 is a deficient number, since it is larger than the sum of its proper divisors (10389830).

20727418 is a wasteful number, since it uses less digits than its factorization.

20727418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8708.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 20727418 is about 4552.7374183012. The cubic root of 20727418 is about 274.6935119890.

The spelling of 20727418 in words is "twenty million, seven hundred twenty-seven thousand, four hundred eighteen".