20718046 has 8 divisors (see below), whose sum is σ = 31122000. Its totient is φ = 10344048.

The previous prime is 20718031. The next prime is 20718073. The reversal of 20718046 is 64081702.

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

It is a congruent number.

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, 5671 + ... + 8578.

It is an arithmetic number, because the mean of its divisors is an integer number (3890250).

Almost surely, 2^20718046 is an apocalyptic number.

20718046 is a deficient number, since it is larger than the sum of its proper divisors (10403954).

20718046 is a wasteful number, since it uses less digits than its factorization.

20718046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14978.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20718046 is about 4551.7080310582. The cubic root of 20718046 is about 274.6521044243.

Adding to 20718046 its reverse (64081702), we get a palindrome (84799748).

The spelling of 20718046 in words is "twenty million, seven hundred eighteen thousand, forty-six".