20452717 has 4 divisors (see below), whose sum is σ = 21655836. Its totient is φ = 19249600.

The previous prime is 20452711. The next prime is 20452723. The reversal of 20452717 is 71725402.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20452711) and next prime (20452723).

It can be written as a sum of positive squares in 2 ways, for example, as 10536516 + 9916201 = 3246^2 + 3149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20452717 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 (20452711) 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, 601534 + ... + 601567.

It is an arithmetic number, because the mean of its divisors is an integer number (5413959).

Almost surely, 2^20452717 is an apocalyptic number.

It is an amenable number.

20452717 is a deficient number, since it is larger than the sum of its proper divisors (1203119).

20452717 is a wasteful number, since it uses less digits than its factorization.

20452717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203118.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 20452717 is about 4522.4680208930. The cubic root of 20452717 is about 273.4746045779.

The spelling of 20452717 in words is "twenty million, four hundred fifty-two thousand, seven hundred seventeen".