20648369 has 8 divisors (see below), whose sum is σ = 24100608. Its totient is φ = 17321760.

The previous prime is 20648357. The next prime is 20648389. The reversal of 20648369 is 96384602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20648369 - 2⁸ = 20648113 is a prime.

It is a super-2 number, since 2×20648369² = 852710284720322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20648389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31052 + ... + 31709.

It is an arithmetic number, because the mean of its divisors is an integer number (3012576).

Almost surely, 2^20648369 is an apocalyptic number.

It is an amenable number.

20648369 is a deficient number, since it is larger than the sum of its proper divisors (3452239).

20648369 is an equidigital number, since it uses as much as digits as its factorization.

20648369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62815.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 20648369 is about 4544.0476449967. The cubic root of 20648369 is about 274.3438638364.

The spelling of 20648369 in words is "twenty million, six hundred forty-eight thousand, three hundred sixty-nine".