20440202043 has 8 divisors (see below), whose sum is σ = 27257912656. Its totient is φ = 13624646400.

The previous prime is 20440202039. The next prime is 20440202047. The reversal of 20440202043 is 34020204402.

It is an interprime number because it is at equal distance from previous prime (20440202039) and next prime (20440202047).

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

It is not a de Polignac number, because 20440202043 - 2² = 20440202039 is a prime.

It is a super-2 number, since 2×20440202043² (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 (20440202047) 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, 516478 + ... + 554643.

It is an arithmetic number, because the mean of its divisors is an integer number (3407239082).

Almost surely, 2^20440202043 is an apocalyptic number.

20440202043 is a deficient number, since it is larger than the sum of its proper divisors (6817710613).

20440202043 is a wasteful number, since it uses less digits than its factorization.

20440202043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077485.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20440202043 its reverse (34020204402), we get a palindrome (54460406445).

The spelling of 20440202043 in words is "twenty billion, four hundred forty million, two hundred two thousand, forty-three".