20672233 has 8 divisors (see below), whose sum is σ = 21318152. Its totient is φ = 20030976.

The previous prime is 20672231. The next prime is 20672237. The reversal of 20672233 is 33227602.

It can be written as a sum of positive squares in 4 ways, for example, as 7225344 + 13446889 = 2688^2 + 3667^2 .

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 20672233 - 2¹ = 20672231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20672198 and 20672207.

It is not an unprimeable number, because it can be changed into a prime (20672231) 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, 9241 + ... + 11257.

It is an arithmetic number, because the mean of its divisors is an integer number (2664769).

Almost surely, 2^20672233 is an apocalyptic number.

It is an amenable number.

20672233 is a deficient number, since it is larger than the sum of its proper divisors (645919).

20672233 is a wasteful number, since it uses less digits than its factorization.

20672233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 20672233 is about 4546.6727394876. The cubic root of 20672233 is about 274.4495125588.

Adding to 20672233 its reverse (33227602), we get a palindrome (53899835).

The spelling of 20672233 in words is "twenty million, six hundred seventy-two thousand, two hundred thirty-three".