20455340043 has 8 divisors (see below), whose sum is σ = 27278166528. Its totient is φ = 13634703464.

The previous prime is 20455339997. The next prime is 20455340071. The reversal of 20455340043 is 34004355402.

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

It is a cyclic number.

It is not a de Polignac number, because 20455340043 - 2²⁶ = 20388231179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20455342043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525555 + ... + 563132.

It is an arithmetic number, because the mean of its divisors is an integer number (3409770816).

Almost surely, 2^20455340043 is an apocalyptic number.

20455340043 is a deficient number, since it is larger than the sum of its proper divisors (6822826485).

20455340043 is a wasteful number, since it uses less digits than its factorization.

20455340043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094953.

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 20455340043 its reverse (34004355402), we get a palindrome (54459695445).

The spelling of 20455340043 in words is "twenty billion, four hundred fifty-five million, three hundred forty thousand, forty-three".