20448653 has 4 divisors (see below), whose sum is σ = 20468988. Its totient is φ = 20428320.

The previous prime is 20448599. The next prime is 20448661. The reversal of 20448653 is 35684402.

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 13410244 + 7038409 = 3662^2 + 2653^2 .

It is a cyclic number.

It is not a de Polignac number, because 20448653 - 2¹⁶ = 20383117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448353) 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, 8576 + ... + 10697.

It is an arithmetic number, because the mean of its divisors is an integer number (5117247).

Almost surely, 2^20448653 is an apocalyptic number.

It is an amenable number.

20448653 is a deficient number, since it is larger than the sum of its proper divisors (20335).

20448653 is a wasteful number, since it uses less digits than its factorization.

20448653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20334.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 20448653 is about 4522.0186863833. The cubic root of 20448653 is about 273.4564900422.

The spelling of 20448653 in words is "twenty million, four hundred forty-eight thousand, six hundred fifty-three".