20365673 has 4 divisors (see below), whose sum is σ = 20376720. Its totient is φ = 20354628.

The previous prime is 20365637. The next prime is 20365691. The reversal of 20365673 is 37656302.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20365673 - 2¹⁰ = 20364649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365633) 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, 2015 + ... + 6692.

It is an arithmetic number, because the mean of its divisors is an integer number (5094180).

Almost surely, 2^20365673 is an apocalyptic number.

It is an amenable number.

20365673 is a deficient number, since it is larger than the sum of its proper divisors (11047).

20365673 is an equidigital number, since it uses as much as digits as its factorization.

20365673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11046.

The product of its (nonzero) digits is 22680, while the sum is 32.

The square root of 20365673 is about 4512.8342535484. The cubic root of 20365673 is about 273.0860959202.

The spelling of 20365673 in words is "twenty million, three hundred sixty-five thousand, six hundred seventy-three".