20144402155 has 16 divisors (see below), whose sum is σ = 24676565760. Its totient is φ = 15782079328.

The previous prime is 20144402141. The next prime is 20144402183. The reversal of 20144402155 is 55120444102.

It is a cyclic number.

It is not a de Polignac number, because 20144402155 - 2⁵ = 20144402123 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52237 + ... + 207406.

It is an arithmetic number, because the mean of its divisors is an integer number (1542285360).

Almost surely, 2^20144402155 is an apocalyptic number.

20144402155 is a deficient number, since it is larger than the sum of its proper divisors (4532163605).

20144402155 is a wasteful number, since it uses less digits than its factorization.

20144402155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259970.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 20144402155 its reverse (55120444102), we get a palindrome (75264846257).

The spelling of 20144402155 in words is "twenty billion, one hundred forty-four million, four hundred two thousand, one hundred fifty-five".