20455423043 has 24 divisors (see below), whose sum is σ = 23822119440. Its totient is φ = 17490598400.

The previous prime is 20455423031. The next prime is 20455423073. The reversal of 20455423043 is 34032455402.

It is not a de Polignac number, because 20455423043 - 2⁸ = 20455422787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455423073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5204303 + ... + 5208231.

It is an arithmetic number, because the mean of its divisors is an integer number (992588310).

Almost surely, 2^20455423043 is an apocalyptic number.

20455423043 is a deficient number, since it is larger than the sum of its proper divisors (3366696397).

20455423043 is a wasteful number, since it uses less digits than its factorization.

20455423043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499 (or 6488 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 20455423043 its reverse (34032455402), we get a palindrome (54487878445).

The spelling of 20455423043 in words is "twenty billion, four hundred fifty-five million, four hundred twenty-three thousand, forty-three".