20050250155 has 32 divisors (see below), whose sum is σ = 26323020864. Its totient is φ = 14571380736.

The previous prime is 20050250123. The next prime is 20050250159. The reversal of 20050250155 is 55105205002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20050250155 - 2⁵ = 20050250123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20050250159) 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 31 ways as a sum of consecutive naturals, for example, 7389079 + ... + 7391791.

It is an arithmetic number, because the mean of its divisors is an integer number (822594402).

Almost surely, 2^20050250155 is an apocalyptic number.

20050250155 is a deficient number, since it is larger than the sum of its proper divisors (6272770709).

20050250155 is a wasteful number, since it uses less digits than its factorization.

20050250155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495.

The product of its (nonzero) digits is 2500, while the sum is 25.

Adding to 20050250155 its reverse (55105205002), we get a palindrome (75155455157).

The spelling of 20050250155 in words is "twenty billion, fifty million, two hundred fifty thousand, one hundred fifty-five".