20443971 has 8 divisors (see below), whose sum is σ = 27381760. Its totient is φ = 13567752.

The previous prime is 20443957. The next prime is 20443999. The reversal of 20443971 is 17934402.

It is a happy number.

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

It is not a de Polignac number, because 20443971 - 2⁵ = 20443939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443901) 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, 14611 + ... + 15948.

It is an arithmetic number, because the mean of its divisors is an integer number (3422720).

Almost surely, 2^20443971 is an apocalyptic number.

20443971 is a deficient number, since it is larger than the sum of its proper divisors (6937789).

20443971 is a wasteful number, since it uses less digits than its factorization.

20443971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30785.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20443971 is about 4521.5009675991. The cubic root of 20443971 is about 273.4356179092.

The spelling of 20443971 in words is "twenty million, four hundred forty-three thousand, nine hundred seventy-one".