20134521 has 24 divisors (see below), whose sum is σ = 32792480. Its totient is φ = 12200760.

The previous prime is 20134489. The next prime is 20134529. The reversal of 20134521 is 12543102.

It is not a de Polignac number, because 20134521 - 2⁵ = 20134489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20134494 and 20134503.

It is not an unprimeable number, because it can be changed into a prime (20134529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186 + ... + 6348.

Almost surely, 2^20134521 is an apocalyptic number.

It is an amenable number.

20134521 is a deficient number, since it is larger than the sum of its proper divisors (12657959).

20134521 is a wasteful number, since it uses less digits than its factorization.

20134521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194 (or 6177 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20134521 is about 4487.1506549257. The cubic root of 20134521 is about 272.0489792492.

Adding to 20134521 its reverse (12543102), we get a palindrome (32677623).

The spelling of 20134521 in words is "twenty million, one hundred thirty-four thousand, five hundred twenty-one".