20137242 has 16 divisors (see below), whose sum is σ = 40331520. Its totient is φ = 6702912.

The previous prime is 20137241. The next prime is 20137253. The reversal of 20137242 is 24273102.

It is not an unprimeable number, because it can be changed into a prime (20137241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3234 + ... + 7122.

It is an arithmetic number, because the mean of its divisors is an integer number (2520720).

Almost surely, 2^20137242 is an apocalyptic number.

20137242 is an abundant number, since it is smaller than the sum of its proper divisors (20194278).

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

20137242 is a wasteful number, since it uses less digits than its factorization.

20137242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4757.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20137242 is about 4487.4538437738. The cubic root of 20137242 is about 272.0612336907.

The spelling of 20137242 in words is "twenty million, one hundred thirty-seven thousand, two hundred forty-two".