20228963 has 8 divisors (see below), whose sum is σ = 21917808. Its totient is φ = 18595584.

The previous prime is 20228959. The next prime is 20228981. The reversal of 20228963 is 36982202.

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

It is a cyclic number.

It is not a de Polignac number, because 20228963 - 2² = 20228959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20228903) 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 7 ways as a sum of consecutive naturals, for example, 13106 + ... + 14567.

It is an arithmetic number, because the mean of its divisors is an integer number (2739726).

Almost surely, 2^20228963 is an apocalyptic number.

20228963 is a deficient number, since it is larger than the sum of its proper divisors (1688845).

20228963 is a wasteful number, since it uses less digits than its factorization.

20228963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27733.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20228963 is about 4497.6619481682. The cubic root of 20228963 is about 272.4736691445.

The spelling of 20228963 in words is "twenty million, two hundred twenty-eight thousand, nine hundred sixty-three".