20748233 has 6 divisors (see below), whose sum is σ = 22806042. Its totient is φ = 18861920.

The previous prime is 20748229. The next prime is 20748241. The reversal of 20748233 is 33284702.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 6512704 = 3773^2 + 2552^2 .

It is not a de Polignac number, because 20748233 - 2² = 20748229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20748196 and 20748205.

It is not an unprimeable number, because it can be changed into a prime (20748223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85616 + ... + 85857.

It is an arithmetic number, because the mean of its divisors is an integer number (3801007).

Almost surely, 2^20748233 is an apocalyptic number.

It is an amenable number.

20748233 is a deficient number, since it is larger than the sum of its proper divisors (2057809).

20748233 is a wasteful number, since it uses less digits than its factorization.

20748233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171495 (or 171484 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20748233 is about 4555.0228319955. The cubic root of 20748233 is about 274.7854326284.

The spelling of 20748233 in words is "twenty million, seven hundred forty-eight thousand, two hundred thirty-three".