20053933 has 4 divisors (see below), whose sum is σ = 20382748. Its totient is φ = 19725120.

The previous prime is 20053927. The next prime is 20053937. The reversal of 20053933 is 33935002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33935002 = 2 ⋅16967501.

It can be written as a sum of positive squares in 2 ways, for example, as 499849 + 19554084 = 707^2 + 4422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20053933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20053898 and 20053907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20053937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164316 + ... + 164437.

It is an arithmetic number, because the mean of its divisors is an integer number (5095687).

Almost surely, 2^20053933 is an apocalyptic number.

It is an amenable number.

20053933 is a deficient number, since it is larger than the sum of its proper divisors (328815).

20053933 is an equidigital number, since it uses as much as digits as its factorization.

20053933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328814.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 20053933 is about 4478.1617880555. The cubic root of 20053933 is about 271.6855371404.

Adding to 20053933 its reverse (33935002), we get a palindrome (53988935).

The spelling of 20053933 in words is "twenty million, fifty-three thousand, nine hundred thirty-three".