20249718 has 16 divisors (see below), whose sum is σ = 40810176. Its totient is φ = 6698120.

The previous prime is 20249717. The next prime is 20249731. The reversal of 20249718 is 81794202.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20249717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12096 + ... + 13667.

It is an arithmetic number, because the mean of its divisors is an integer number (2550636).

Almost surely, 2^20249718 is an apocalyptic number.

20249718 is an abundant number, since it is smaller than the sum of its proper divisors (20560458).

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

20249718 is a wasteful number, since it uses less digits than its factorization.

20249718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25899.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20249718 is about 4499.9686665576. The cubic root of 20249718 is about 272.5668236646.

The spelling of 20249718 in words is "twenty million, two hundred forty-nine thousand, seven hundred eighteen".