20284440006443 has 4 divisors (see below), whose sum is σ = 20284458130968. Its totient is φ = 20284421881920.

The previous prime is 20284440006407. The next prime is 20284440006461. The reversal of 20284440006443 is 34460004448202.

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 20284440006443 - 2⁶ = 20284440006379 is a prime.

It is a super-2 number, since 2×20284440006443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20284440006443.

It is not an unprimeable number, because it can be changed into a prime (20284440006043) 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, 7264646 + ... + 9661467.

It is an arithmetic number, because the mean of its divisors is an integer number (5071114532742).

Almost surely, 2^{20284440006443} is an apocalyptic number.

20284440006443 is a deficient number, since it is larger than the sum of its proper divisors (18124525).

20284440006443 is a wasteful number, since it uses less digits than its factorization.

20284440006443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18124524.

The product of its (nonzero) digits is 589824, while the sum is 41.

The spelling of 20284440006443 in words is "twenty trillion, two hundred eighty-four billion, four hundred forty million, six thousand, four hundred forty-three".