20915682 has 8 divisors (see below), whose sum is σ = 41831376. Its totient is φ = 6971892.

The previous prime is 20915663. The next prime is 20915689. The reversal of 20915682 is 28651902.

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

20915682 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20915689) 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, 1742968 + ... + 1742979.

It is an arithmetic number, because the mean of its divisors is an integer number (5228922).

Almost surely, 2^20915682 is an apocalyptic number.

20915682 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.

20915682 is a wasteful number, since it uses less digits than its factorization.

20915682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485952.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 20915682 is about 4573.3665936594. The cubic root of 20915682 is about 275.5226731801.

The spelling of 20915682 in words is "twenty million, nine hundred fifteen thousand, six hundred eighty-two".