20443801 has 4 divisors (see below), whose sum is σ = 23364352. Its totient is φ = 17523252.

The previous prime is 20443793. The next prime is 20443807. The reversal of 20443801 is 10834402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10834402 = 2 ⋅5417201.

It is a cyclic number.

It is not a de Polignac number, because 20443801 - 2³ = 20443793 is a prime.

It is a super-3 number, since 3×20443801³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443807) 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, 1460265 + ... + 1460278.

It is an arithmetic number, because the mean of its divisors is an integer number (5841088).

Almost surely, 2^20443801 is an apocalyptic number.

It is an amenable number.

20443801 is a deficient number, since it is larger than the sum of its proper divisors (2920551).

20443801 is an equidigital number, since it uses as much as digits as its factorization.

20443801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920550.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20443801 is about 4521.4821684930. The cubic root of 20443801 is about 273.4348599974.

The spelling of 20443801 in words is "twenty million, four hundred forty-three thousand, eight hundred one".