20018933 has 8 divisors (see below), whose sum is σ = 21939456. Its totient is φ = 18115200.

The previous prime is 20018923. The next prime is 20018941. The reversal of 20018933 is 33981002.

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 20018933 - 2¹² = 20014837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018923) 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, 1628 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (2742432).

Almost surely, 2^20018933 is an apocalyptic number.

It is an amenable number.

20018933 is a deficient number, since it is larger than the sum of its proper divisors (1920523).

20018933 is a wasteful number, since it uses less digits than its factorization.

20018933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20018933 is about 4474.2522280265. The cubic root of 20018933 is about 271.5273880936.

Adding to 20018933 its reverse (33981002), we get a palindrome (53999935).

The spelling of 20018933 in words is "twenty million, eighteen thousand, nine hundred thirty-three".