20444743 has 4 divisors (see below), whose sum is σ = 22303368. Its totient is φ = 18586120.

The previous prime is 20444731. The next prime is 20444759. The reversal of 20444743 is 34744402.

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

It is a cyclic number.

It is not a de Polignac number, because 20444743 - 2¹³ = 20436551 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 (20444713) 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, 929296 + ... + 929317.

It is an arithmetic number, because the mean of its divisors is an integer number (5575842).

Almost surely, 2^20444743 is an apocalyptic number.

20444743 is a deficient number, since it is larger than the sum of its proper divisors (1858625).

20444743 is a wasteful number, since it uses less digits than its factorization.

20444743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858624.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 20444743 is about 4521.5863366743. The cubic root of 20444743 is about 273.4390596678.

The spelling of 20444743 in words is "twenty million, four hundred forty-four thousand, seven hundred forty-three".