20228774 has 8 divisors (see below), whose sum is σ = 30796248. Its totient is φ = 9963360.

The previous prime is 20228743. The next prime is 20228777. The reversal of 20228774 is 47782202.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20228774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75347 + ... + 75614.

It is an arithmetic number, because the mean of its divisors is an integer number (3849531).

Almost surely, 2^20228774 is an apocalyptic number.

20228774 is a deficient number, since it is larger than the sum of its proper divisors (10567474).

20228774 is a wasteful number, since it uses less digits than its factorization.

20228774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151030.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20228774 is about 4497.6409372025. The cubic root of 20228774 is about 272.4728205644.

The spelling of 20228774 in words is "twenty million, two hundred twenty-eight thousand, seven hundred seventy-four".