20440302443 has 8 divisors (see below), whose sum is σ = 22301062896. Its totient is φ = 18579967200.

The previous prime is 20440302437. The next prime is 20440302457. The reversal of 20440302443 is 34420304402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440302443 is a prime.

It is a super-2 number, since 2×20440302443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440302143) 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, 1268 + ... + 202193.

It is an arithmetic number, because the mean of its divisors is an integer number (2787632862).

Almost surely, 2^20440302443 is an apocalyptic number.

20440302443 is a deficient number, since it is larger than the sum of its proper divisors (1860760453).

20440302443 is a wasteful number, since it uses less digits than its factorization.

20440302443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212605.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20440302443 its reverse (34420304402), we get a palindrome (54860606845).

The spelling of 20440302443 in words is "twenty billion, four hundred forty million, three hundred two thousand, four hundred forty-three".