20216308 has 12 divisors (see below), whose sum is σ = 40432672. Its totient is φ = 8664120.

The previous prime is 20216303. The next prime is 20216311. The reversal of 20216308 is 80361202.

20216308 is an admirable number.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360978 + ... + 361033.

Almost surely, 2^20216308 is an apocalyptic number.

20216308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20216308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20216308 is a wasteful number, since it uses less digits than its factorization.

20216308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722022 (or 722020 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20216308 is about 4496.2548860135. The cubic root of 20216308 is about 272.4168385237.

The spelling of 20216308 in words is "twenty million, two hundred sixteen thousand, three hundred eight".