20545333 has 8 divisors (see below), whose sum is σ = 21793752. Its totient is φ = 19301376.

The previous prime is 20545331. The next prime is 20545363. The reversal of 20545333 is 33354502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13373649 + 7171684 = 3657^2 + 2678^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20545333 - 2¹ = 20545331 is a prime.

It is a super-2 number, since 2×20545333² = 844221416161778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20545298 and 20545307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15991 + ... + 17227.

It is an arithmetic number, because the mean of its divisors is an integer number (2724219).

Almost surely, 2^20545333 is an apocalyptic number.

It is an amenable number.

20545333 is a deficient number, since it is larger than the sum of its proper divisors (1248419).

20545333 is a wasteful number, since it uses less digits than its factorization.

20545333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 20545333 is about 4532.6959968654. The cubic root of 20545333 is about 273.8867745725.

Adding to 20545333 its reverse (33354502), we get a palindrome (53899835).

The spelling of 20545333 in words is "twenty million, five hundred forty-five thousand, three hundred thirty-three".