20082778 has 8 divisors (see below), whose sum is σ = 30185568. Its totient is φ = 10020924.

The previous prime is 20082767. The next prime is 20082787. The reversal of 20082778 is 87728002.

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

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, 8976 + ... + 10987.

It is an arithmetic number, because the mean of its divisors is an integer number (3773196).

Almost surely, 2^20082778 is an apocalyptic number.

20082778 is a deficient number, since it is larger than the sum of its proper divisors (10102790).

20082778 is a wasteful number, since it uses less digits than its factorization.

20082778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 20082778 is about 4481.3812602813. The cubic root of 20082778 is about 271.8157362876.

The spelling of 20082778 in words is "twenty million, eighty-two thousand, seven hundred seventy-eight".