20229216 has 48 divisors (see below), whose sum is σ = 60689664. Its totient is φ = 5779584.

The previous prime is 20229197. The next prime is 20229217. The reversal of 20229216 is 61292202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14380 + ... + 15723.

It is an arithmetic number, because the mean of its divisors is an integer number (1264368).

Almost surely, 2^20229216 is an apocalyptic number.

It is an amenable number.

20229216 is an abundant number, since it is smaller than the sum of its proper divisors (40460448).

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

20229216 is a wasteful number, since it uses less digits than its factorization.

20229216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30123 (or 30115 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20229216 is about 4497.6900738046. The cubic root of 20229216 is about 272.4748050661.

The spelling of 20229216 in words is "twenty million, two hundred twenty-nine thousand, two hundred sixteen".