20733313 has 12 divisors (see below), whose sum is σ = 22189440. Its totient is φ = 19366776.

The previous prime is 20733259. The next prime is 20733337. The reversal of 20733313 is 31333702.

20733313 = T₁₄₂ + T₁₄₃ + ... + T₅₀₂.

It is a de Polignac number, because none of the positive numbers 2^k-20733313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20733613) 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, 28156 + ... + 28882.

It is an arithmetic number, because the mean of its divisors is an integer number (1849120).

Almost surely, 2^20733313 is an apocalyptic number.

It is an amenable number.

20733313 is a deficient number, since it is larger than the sum of its proper divisors (1456127).

20733313 is an equidigital number, since it uses as much as digits as its factorization.

20733313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 22.

The square root of 20733313 is about 4553.3847849704. The cubic root of 20733313 is about 274.7195510059.

The spelling of 20733313 in words is "twenty million, seven hundred thirty-three thousand, three hundred thirteen".