20443479 has 16 divisors (see below), whose sum is σ = 31664640. Its totient is φ = 11489760.

The previous prime is 20443459. The next prime is 20443523. The reversal of 20443479 is 97434402.

It is not a de Polignac number, because 20443479 - 2¹³ = 20435287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6699 + ... + 9260.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^20443479 is an apocalyptic number.

20443479 is a deficient number, since it is larger than the sum of its proper divisors (11221161).

20443479 is a wasteful number, since it uses less digits than its factorization.

20443479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16030.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 20443479 is about 4521.4465605600. The cubic root of 20443479 is about 273.4334244116.

The spelling of 20443479 in words is "twenty million, four hundred forty-three thousand, four hundred seventy-nine".