20247668 has 48 divisors (see below), whose sum is σ = 42223104. Its totient is φ = 8316000.

The previous prime is 20247611. The next prime is 20247671. The reversal of 20247668 is 86674202.

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 15 ways as a sum of consecutive naturals, for example, 80543 + ... + 80793.

It is an arithmetic number, because the mean of its divisors is an integer number (879648).

Almost surely, 2^20247668 is an apocalyptic number.

20247668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20247668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21111552).

20247668 is an abundant number, since it is smaller than the sum of its proper divisors (21975436).

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

20247668 is a wasteful number, since it uses less digits than its factorization.

20247668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20247668 is about 4499.7408814286. The cubic root of 20247668 is about 272.5576254979.

The spelling of 20247668 in words is "twenty million, two hundred forty-seven thousand, six hundred sixty-eight".