20228968 has 8 divisors (see below), whose sum is σ = 37929330. Its totient is φ = 10114480.

The previous prime is 20228959. The next prime is 20228981. The reversal of 20228968 is 86982202.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 8655364 = 3402^2 + 2942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20228968² = 818422292690048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1264303 + ... + 1264318.

Almost surely, 2^20228968 is an apocalyptic number.

It is an amenable number.

20228968 is a deficient number, since it is larger than the sum of its proper divisors (17700362).

20228968 is a wasteful number, since it uses less digits than its factorization.

20228968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528627 (or 2528623 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20228968 is about 4497.6625040125. The cubic root of 20228968 is about 272.4736915936.

The spelling of 20228968 in words is "twenty million, two hundred twenty-eight thousand, nine hundred sixty-eight".