20778214 has 8 divisors (see below), whose sum is σ = 31443480. Its totient is φ = 10297056.

The previous prime is 20778211. The next prime is 20778253. The reversal of 20778214 is 41287702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20778211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45744 + ... + 46195.

It is an arithmetic number, because the mean of its divisors is an integer number (3930435).

Almost surely, 2^20778214 is an apocalyptic number.

20778214 is a deficient number, since it is larger than the sum of its proper divisors (10665266).

20778214 is a wasteful number, since it uses less digits than its factorization.

20778214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92054.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 20778214 is about 4558.3126264003. The cubic root of 20778214 is about 274.9177230445.

The spelling of 20778214 in words is "twenty million, seven hundred seventy-eight thousand, two hundred fourteen".