20533516 has 6 divisors (see below), whose sum is σ = 35933660. Its totient is φ = 10266756.

The previous prime is 20533511. The next prime is 20533519. The reversal of 20533516 is 61533502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20533511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2566686 + ... + 2566693.

Almost surely, 2^20533516 is an apocalyptic number.

It is an amenable number.

20533516 is a deficient number, since it is larger than the sum of its proper divisors (15400144).

20533516 is a wasteful number, since it uses less digits than its factorization.

20533516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133383 (or 5133381 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 20533516 is about 4531.3922805248. The cubic root of 20533516 is about 273.8342542795.

The spelling of 20533516 in words is "twenty million, five hundred thirty-three thousand, five hundred sixteen".