20228378 has 8 divisors (see below), whose sum is σ = 30377268. Its totient is φ = 10102624.

The previous prime is 20228363. The next prime is 20228423. The reversal of 20228378 is 87382202.

It can be written as a sum of positive squares in 2 ways, for example, as 18088009 + 2140369 = 4253^2 + 1463^2 .

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, 3401 + ... + 7212.

Almost surely, 2^20228378 is an apocalyptic number.

20228378 is a deficient number, since it is larger than the sum of its proper divisors (10148890).

20228378 is a wasteful number, since it uses less digits than its factorization.

20228378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11568.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20228378 is about 4497.5969139086. The cubic root of 20228378 is about 272.4710425700.

The spelling of 20228378 in words is "twenty million, two hundred twenty-eight thousand, three hundred seventy-eight".