20134537 has 4 divisors (see below), whose sum is σ = 20146896. Its totient is φ = 20122180.

The previous prime is 20134529. The next prime is 20134553. The reversal of 20134537 is 73543102.

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 20134537 - 2³ = 20134529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3283 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (5036724).

Almost surely, 2^20134537 is an apocalyptic number.

It is an amenable number.

20134537 is a deficient number, since it is larger than the sum of its proper divisors (12359).

20134537 is a wasteful number, since it uses less digits than its factorization.

20134537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20134537 is about 4487.1524377939. The cubic root of 20134537 is about 272.0490513109.

Adding to 20134537 its reverse (73543102), we get a palindrome (93677639).

The spelling of 20134537 in words is "twenty million, one hundred thirty-four thousand, five hundred thirty-seven".