20308908 has 24 divisors (see below), whose sum is σ = 49448448. Its totient is φ = 6475216.

The previous prime is 20308907. The next prime is 20308909. The reversal of 20308908 is 80980302.

It is an interprime number because it is at equal distance from previous prime (20308907) and next prime (20308909).

It is a super-3 number, since 3×20308908³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20308901) 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, 36516 + ... + 37067.

It is an arithmetic number, because the mean of its divisors is an integer number (2060352).

Almost surely, 2^20308908 is an apocalyptic number.

It is an amenable number.

20308908 is an abundant number, since it is smaller than the sum of its proper divisors (29139540).

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

20308908 is a wasteful number, since it uses less digits than its factorization.

20308908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73613 (or 73611 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20308908 is about 4506.5405800902. The cubic root of 20308908 is about 272.8321366039.

The spelling of 20308908 in words is "twenty million, three hundred eight thousand, nine hundred eight".