20144415503555 has 16 divisors (see below), whose sum is σ = 27627187679424. Its totient is φ = 13813033136640.

The previous prime is 20144415503497. The next prime is 20144415503621. The reversal of 20144415503555 is 55530551444102.

It is a happy number.

It is not a de Polignac number, because 20144415503555 - 2¹² = 20144415499459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4084082 + ... + 7547751.

It is an arithmetic number, because the mean of its divisors is an integer number (1726699229964).

Almost surely, 2^{20144415503555} is an apocalyptic number.

20144415503555 is a deficient number, since it is larger than the sum of its proper divisors (7482772175869).

20144415503555 is a wasteful number, since it uses less digits than its factorization.

20144415503555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11681326.

The product of its (nonzero) digits is 1200000, while the sum is 44.

Adding to 20144415503555 its reverse (55530551444102), we get a palindrome (75674966947657).

The spelling of 20144415503555 in words is "twenty trillion, one hundred forty-four billion, four hundred fifteen million, five hundred three thousand, five hundred fifty-five".