20804733 has 12 divisors (see below), whose sum is σ = 30750720. Its totient is φ = 13547016.

The previous prime is 20804731. The next prime is 20804737. The reversal of 20804733 is 33740802.

It is not a de Polignac number, because 20804733 - 2¹ = 20804731 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20804697 and 20804706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26493 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (2562560).

Almost surely, 2^20804733 is an apocalyptic number.

It is an amenable number.

20804733 is a deficient number, since it is larger than the sum of its proper divisors (9945987).

20804733 is a wasteful number, since it uses less digits than its factorization.

20804733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53808 (or 53805 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20804733 is about 4561.2205603325. The cubic root of 20804733 is about 275.0346314513.

The spelling of 20804733 in words is "twenty million, eight hundred four thousand, seven hundred thirty-three".