20465453 has 4 divisors (see below), whose sum is σ = 20482620. Its totient is φ = 20448288.

The previous prime is 20465449. The next prime is 20465491. The reversal of 20465453 is 35456402.

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 19377604 + 1087849 = 4402^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 20465453 - 2² = 20465449 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 (20465353) 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, 6650 + ... + 9227.

It is an arithmetic number, because the mean of its divisors is an integer number (5120655).

Almost surely, 2^20465453 is an apocalyptic number.

It is an amenable number.

20465453 is a deficient number, since it is larger than the sum of its proper divisors (17167).

20465453 is a wasteful number, since it uses less digits than its factorization.

20465453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17166.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20465453 is about 4523.8758824707. The cubic root of 20465453 is about 273.5313574266.

The spelling of 20465453 in words is "twenty million, four hundred sixty-five thousand, four hundred fifty-three".