20155411244 has 12 divisors (see below), whose sum is σ = 36805533744. Its totient is φ = 9639544464.

The previous prime is 20155411229. The next prime is 20155411273. The reversal of 20155411244 is 44211455102.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 109540187 + ... + 109540370.

It is an arithmetic number, because the mean of its divisors is an integer number (3067127812).

Almost surely, 2^20155411244 is an apocalyptic number.

It is an amenable number.

20155411244 is a deficient number, since it is larger than the sum of its proper divisors (16650122500).

20155411244 is a wasteful number, since it uses less digits than its factorization.

20155411244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219080584 (or 219080582 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 20155411244 its reverse (44211455102), we get a palindrome (64366866346).

The spelling of 20155411244 in words is "twenty billion, one hundred fifty-five million, four hundred eleven thousand, two hundred forty-four".