20935073 has 4 divisors (see below), whose sum is σ = 20949780. Its totient is φ = 20920368.

The previous prime is 20935049. The next prime is 20935087. The reversal of 20935073 is 37053902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6012304 + 14922769 = 2452^2 + 3863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20935073 - 2⁶ = 20935009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20935043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4958 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (5237445).

Almost surely, 2^20935073 is an apocalyptic number.

It is an amenable number.

20935073 is a deficient number, since it is larger than the sum of its proper divisors (14707).

20935073 is a wasteful number, since it uses less digits than its factorization.

20935073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14706.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 20935073 is about 4575.4860943948. The cubic root of 20935073 is about 275.6077928834.

Adding to 20935073 its reverse (37053902), we get a palindrome (57988975).

The spelling of 20935073 in words is "twenty million, nine hundred thirty-five thousand, seventy-three".