20154228 has 48 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 6544384.

The previous prime is 20154227. The next prime is 20154271. The reversal of 20154228 is 82245102.

It is a super-3 number, since 3×20154228³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20154198 and 20154207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154227) 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 15 ways as a sum of consecutive naturals, for example, 120601 + ... + 120767.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^20154228 is an apocalyptic number.

It is an amenable number.

20154228 is an abundant number, since it is smaller than the sum of its proper divisors (28108812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20154228 is a wasteful number, since it uses less digits than its factorization.

20154228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20154228 is about 4489.3460548280. The cubic root of 20154228 is about 272.1377078072.

The spelling of 20154228 in words is "twenty million, one hundred fifty-four thousand, two hundred twenty-eight".