20228966 has 4 divisors (see below), whose sum is σ = 30343452. Its totient is φ = 10114482.

The previous prime is 20228959. The next prime is 20228981. The reversal of 20228966 is 66982202.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20228966² = 818422130858312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5057240 + ... + 5057243.

It is an arithmetic number, because the mean of its divisors is an integer number (7585863).

Almost surely, 2^20228966 is an apocalyptic number.

20228966 is a deficient number, since it is larger than the sum of its proper divisors (10114486).

20228966 is a wasteful number, since it uses less digits than its factorization.

20228966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10114485.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20228966 is about 4497.6622816748. The cubic root of 20228966 is about 272.4736826140.

The spelling of 20228966 in words is "twenty million, two hundred twenty-eight thousand, nine hundred sixty-six".