20778327 has 12 divisors (see below), whose sum is σ = 30280224. Its totient is φ = 13728960.

The previous prime is 20778323. The next prime is 20778353. The reversal of 20778327 is 72387702.

It is not a de Polignac number, because 20778327 - 2² = 20778323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20778291 and 20778300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20778323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9199 + ... + 11232.

It is an arithmetic number, because the mean of its divisors is an integer number (2523352).

Almost surely, 2^20778327 is an apocalyptic number.

20778327 is a deficient number, since it is larger than the sum of its proper divisors (9501897).

20778327 is a wasteful number, since it uses less digits than its factorization.

20778327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20550 (or 20547 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 20778327 is about 4558.3250213209. The cubic root of 20778327 is about 274.9182214134.

It can be divided in two parts, 2077 and 8327, that added together give a square (10404 = 102²).

The spelling of 20778327 in words is "twenty million, seven hundred seventy-eight thousand, three hundred twenty-seven".