20455124042 has 8 divisors (see below), whose sum is σ = 30780714756. Its totient is φ = 10194885792.

The previous prime is 20455124023. The next prime is 20455124087. The reversal of 20455124042 is 24042155402.

It can be written as a sum of positive squares in 2 ways, for example, as 19342968241 + 1112155801 = 139079^2 + 33349^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20455123996 and 20455124014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16337333 + ... + 16338584.

Almost surely, 2^20455124042 is an apocalyptic number.

20455124042 is a deficient number, since it is larger than the sum of its proper divisors (10325590714).

20455124042 is a wasteful number, since it uses less digits than its factorization.

20455124042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32676232.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20455124042 its reverse (24042155402), we get a palindrome (44497279444).

The spelling of 20455124042 in words is "twenty billion, four hundred fifty-five million, one hundred twenty-four thousand, forty-two".