20367965 has 4 divisors (see below), whose sum is σ = 24441564. Its totient is φ = 16294368.

The previous prime is 20367923. The next prime is 20367973. The reversal of 20367965 is 56976302.

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 10621081 + 9746884 = 3259^2 + 3122^2 .

It is a cyclic number.

It is not a de Polignac number, because 20367965 - 2⁶ = 20367901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036792 + ... + 2036801.

It is an arithmetic number, because the mean of its divisors is an integer number (6110391).

Almost surely, 2^20367965 is an apocalyptic number.

It is an amenable number.

20367965 is a deficient number, since it is larger than the sum of its proper divisors (4073599).

20367965 is an equidigital number, since it uses as much as digits as its factorization.

20367965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073598.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 20367965 is about 4513.0881888126. The cubic root of 20367965 is about 273.0963401165.

It can be divided in two parts, 2036 and 7965, that added together give a palindrome (10001).

The spelling of 20367965 in words is "twenty million, three hundred sixty-seven thousand, nine hundred sixty-five".