20237147 has 12 divisors (see below), whose sum is σ = 24781320. Its totient is φ = 16432416.

The previous prime is 20237117. The next prime is 20237153. The reversal of 20237147 is 74173202.

It is not a de Polignac number, because 20237147 - 2¹⁰ = 20236123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20237117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9938 + ... + 11799.

It is an arithmetic number, because the mean of its divisors is an integer number (2065110).

Almost surely, 2^20237147 is an apocalyptic number.

20237147 is a deficient number, since it is larger than the sum of its proper divisors (4544173).

20237147 is a wasteful number, since it uses less digits than its factorization.

20237147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770 (or 21763 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20237147 is about 4498.5716622057. The cubic root of 20237147 is about 272.5104089394.

The spelling of 20237147 in words is "twenty million, two hundred thirty-seven thousand, one hundred forty-seven".