20444745 has 16 divisors (see below), whose sum is σ = 33161472. Its totient is φ = 10753920.

The previous prime is 20444731. The next prime is 20444759. The reversal of 20444745 is 54744402.

It is an interprime number because it is at equal distance from previous prime (20444731) and next prime (20444759).

It is not a de Polignac number, because 20444745 - 2⁴ = 20444729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8241 + ... + 10430.

It is an arithmetic number, because the mean of its divisors is an integer number (2072592).

Almost surely, 2^20444745 is an apocalyptic number.

It is an amenable number.

20444745 is a deficient number, since it is larger than the sum of its proper divisors (12716727).

20444745 is a wasteful number, since it uses less digits than its factorization.

20444745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18752.

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 20444745 is about 4521.5865578356. The cubic root of 20444745 is about 273.4390685842.

The spelling of 20444745 in words is "twenty million, four hundred forty-four thousand, seven hundred forty-five".