20966878 has 8 divisors (see below), whose sum is σ = 31469760. Its totient is φ = 10476960.

The previous prime is 20966851. The next prime is 20966903. The reversal of 20966878 is 87866902.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4563 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (3933720).

Almost surely, 2^20966878 is an apocalyptic number.

20966878 is a deficient number, since it is larger than the sum of its proper divisors (10502882).

20966878 is a wasteful number, since it uses less digits than its factorization.

20966878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 20966878 is about 4578.9603623530. The cubic root of 20966878 is about 275.7472919683.

The spelling of 20966878 in words is "twenty million, nine hundred sixty-six thousand, eight hundred seventy-eight".