20147137 has 4 divisors (see below), whose sum is σ = 20335536. Its totient is φ = 19958740.

The previous prime is 20147131. The next prime is 20147147. The reversal of 20147137 is 73174102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20147137 - 2¹¹ = 20145089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20147131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94039 + ... + 94252.

It is an arithmetic number, because the mean of its divisors is an integer number (5083884).

Almost surely, 2^20147137 is an apocalyptic number.

It is an amenable number.

20147137 is a deficient number, since it is larger than the sum of its proper divisors (188399).

20147137 is a wasteful number, since it uses less digits than its factorization.

20147137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188398.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20147137 is about 4488.5562266724. The cubic root of 20147137 is about 272.1057880392.

The spelling of 20147137 in words is "twenty million, one hundred forty-seven thousand, one hundred thirty-seven".