20055100042 has 8 divisors (see below), whose sum is σ = 30650247396. Its totient is φ = 9838350912.

The previous prime is 20055100031. The next prime is 20055100049. The reversal of 20055100042 is 24000155002.

It can be written as a sum of positive squares in 2 ways, for example, as 18733123161 + 1321976881 = 136869^2 + 36359^2 .

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 = 20055099992 and 20055100019.

It is not an unprimeable number, because it can be changed into a prime (20055100049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94599423 + ... + 94599634.

Almost surely, 2^20055100042 is an apocalyptic number.

20055100042 is a deficient number, since it is larger than the sum of its proper divisors (10595147354).

20055100042 is a wasteful number, since it uses less digits than its factorization.

20055100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189199112.

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20055100042 its reverse (24000155002), we get a palindrome (44055255044).

The spelling of 20055100042 in words is "twenty billion, fifty-five million, one hundred thousand, forty-two".