20982378 has 8 divisors (see below), whose sum is σ = 41964768. Its totient is φ = 6994124.

The previous prime is 20982359. The next prime is 20982389. The reversal of 20982378 is 87328902.

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

20982378 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748526 + ... + 1748537.

It is an arithmetic number, because the mean of its divisors is an integer number (5245596).

Almost surely, 2^20982378 is an apocalyptic number.

20982378 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.

20982378 is a wasteful number, since it uses less digits than its factorization.

20982378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497068.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20982378 is about 4580.6525735969. The cubic root of 20982378 is about 275.8152249917.

The spelling of 20982378 in words is "twenty million, nine hundred eighty-two thousand, three hundred seventy-eight".