20890718 has 8 divisors (see below), whose sum is σ = 32183112. Its totient is φ = 10163016.

The previous prime is 20890711. The next prime is 20890721. The reversal of 20890718 is 81709802.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20890711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141080 + ... + 141227.

It is an arithmetic number, because the mean of its divisors is an integer number (4022889).

Almost surely, 2^20890718 is an apocalyptic number.

20890718 is a deficient number, since it is larger than the sum of its proper divisors (11292394).

20890718 is a wasteful number, since it uses less digits than its factorization.

20890718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282346.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 20890718 is about 4570.6364983446. The cubic root of 20890718 is about 275.4130124590.

The spelling of 20890718 in words is "twenty million, eight hundred ninety thousand, seven hundred eighteen".