20011443 has 16 divisors (see below), whose sum is σ = 27336960. Its totient is φ = 13017056.

The previous prime is 20011441. The next prime is 20011463. The reversal of 20011443 is 34411002.

It is a cyclic number.

It is not a de Polignac number, because 20011443 - 2¹ = 20011441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29221 + ... + 29897.

It is an arithmetic number, because the mean of its divisors is an integer number (1708560).

Almost surely, 2^20011443 is an apocalyptic number.

20011443 is a deficient number, since it is larger than the sum of its proper divisors (7325517).

20011443 is a wasteful number, since it uses less digits than its factorization.

20011443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20011443 is about 4473.4151383479. The cubic root of 20011443 is about 271.4935202575.

Adding to 20011443 its reverse (34411002), we get a palindrome (54422445).

The spelling of 20011443 in words is "twenty million, eleven thousand, four hundred forty-three".