20363669 has 4 divisors (see below), whose sum is σ = 20388396. Its totient is φ = 20338944.

The previous prime is 20363663. The next prime is 20363677. The reversal of 20363669 is 96636302.

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 1787569 + 18576100 = 1337^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363669 - 2¹⁶ = 20298133 is a prime.

It is a super-3 number, since 3×20363669³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20363663) 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, 11084 + ... + 12789.

It is an arithmetic number, because the mean of its divisors is an integer number (5097099).

Almost surely, 2^20363669 is an apocalyptic number.

It is an amenable number.

20363669 is a deficient number, since it is larger than the sum of its proper divisors (24727).

20363669 is an equidigital number, since it uses as much as digits as its factorization.

20363669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24726.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 20363669 is about 4512.6122146712. The cubic root of 20363669 is about 273.0771383230.

The spelling of 20363669 in words is "twenty million, three hundred sixty-three thousand, six hundred sixty-nine".