20265745 has 8 divisors (see below), whose sum is σ = 24592680. Its totient is φ = 16030080.

The previous prime is 20265709. The next prime is 20265779. The reversal of 20265745 is 54756202.

It can be written as a sum of positive squares in 4 ways, for example, as 204304 + 20061441 = 452^2 + 4479^2 .

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

It is not a de Polignac number, because 20265745 - 2¹⁵ = 20232977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22326 + ... + 23215.

It is an arithmetic number, because the mean of its divisors is an integer number (3074085).

Almost surely, 2^20265745 is an apocalyptic number.

It is an amenable number.

20265745 is a deficient number, since it is larger than the sum of its proper divisors (4326935).

20265745 is an equidigital number, since it uses as much as digits as its factorization.

20265745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45635.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 20265745 is about 4501.7491045148. The cubic root of 20265745 is about 272.6387139908.

The spelling of 20265745 in words is "twenty million, two hundred sixty-five thousand, seven hundred forty-five".