20447682 has 8 divisors (see below), whose sum is σ = 40895376. Its totient is φ = 6815892.

The previous prime is 20447681. The next prime is 20447683. The reversal of 20447682 is 28674402.

It is an interprime number because it is at equal distance from previous prime (20447681) and next prime (20447683).

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

20447682 is an admirable number.

It is a super-3 number, since 3×20447682³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20447681) 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, 1703968 + ... + 1703979.

It is an arithmetic number, because the mean of its divisors is an integer number (5111922).

Almost surely, 2^20447682 is an apocalyptic number.

20447682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20447682 is a wasteful number, since it uses less digits than its factorization.

20447682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407952.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 20447682 is about 4521.9113215542. The cubic root of 20447682 is about 273.4521616323.

The spelling of 20447682 in words is "twenty million, four hundred forty-seven thousand, six hundred eighty-two".