20308158 has 40 divisors (see below), whose sum is σ = 49010808. Its totient is φ = 6248016.

The previous prime is 20308157. The next prime is 20308187. The reversal of 20308158 is 85180302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2716 + ... + 6927.

Almost surely, 2^20308158 is an apocalyptic number.

20308158 is an abundant number, since it is smaller than the sum of its proper divisors (28702650).

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

20308158 is a wasteful number, since it uses less digits than its factorization.

20308158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9670 (or 9661 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 20308158 is about 4506.4573669347. The cubic root of 20308158 is about 272.8287780346.

The spelling of 20308158 in words is "twenty million, three hundred eight thousand, one hundred fifty-eight".