20676778 has 8 divisors (see below), whose sum is σ = 31252320. Its totient is φ = 10259340.

The previous prime is 20676707. The next prime is 20676781. The reversal of 20676778 is 87767602.

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

It is a super-2 number, since 2×20676778² = 855058296922568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39198 + ... + 39721.

It is an arithmetic number, because the mean of its divisors is an integer number (3906540).

Almost surely, 2^20676778 is an apocalyptic number.

20676778 is a deficient number, since it is larger than the sum of its proper divisors (10575542).

20676778 is a wasteful number, since it uses less digits than its factorization.

20676778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79052.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 20676778 is about 4547.1725280662. The cubic root of 20676778 is about 274.4696245875.

The spelling of 20676778 in words is "twenty million, six hundred seventy-six thousand, seven hundred seventy-eight".