20453705 has 8 divisors (see below), whose sum is σ = 24707904. Its totient is φ = 16254000.

The previous prime is 20453701. The next prime is 20453717. The reversal of 20453705 is 50735402.

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

It is not a de Polignac number, because 20453705 - 2² = 20453701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20453701) 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, 12791 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (3088488).

Almost surely, 2^20453705 is an apocalyptic number.

It is an amenable number.

20453705 is a deficient number, since it is larger than the sum of its proper divisors (4254199).

20453705 is a wasteful number, since it uses less digits than its factorization.

20453705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27247.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20453705 is about 4522.5772519660. The cubic root of 20453705 is about 273.4790080443.

The spelling of 20453705 in words is "twenty million, four hundred fifty-three thousand, seven hundred five".