20616933 has 4 divisors (see below), whose sum is σ = 27489248. Its totient is φ = 13744620.

The previous prime is 20616931. The next prime is 20616961. The reversal of 20616933 is 33961602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20616933 - 2¹ = 20616931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20616933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20616931) 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, 3436153 + ... + 3436158.

It is an arithmetic number, because the mean of its divisors is an integer number (6872312).

Almost surely, 2^20616933 is an apocalyptic number.

It is an amenable number.

20616933 is a deficient number, since it is larger than the sum of its proper divisors (6872315).

20616933 is an equidigital number, since it uses as much as digits as its factorization.

20616933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872314.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 20616933 is about 4540.5872968152. The cubic root of 20616933 is about 274.2045686687.

The spelling of 20616933 in words is "twenty million, six hundred sixteen thousand, nine hundred thirty-three".