20100144555 has 24 divisors (see below), whose sum is σ = 36673949520. Its totient is φ = 10155862080.

The previous prime is 20100144527. The next prime is 20100144607. The reversal of 20100144555 is 55544100102.

20100144555 is a `hidden beast` number, since 2 + 0 + 100 + 1 + 4 + 4 + 555 = 666.

It is not a de Polignac number, because 20100144555 - 2⁸ = 20100144299 is a prime.

It is a super-2 number, since 2×20100144555² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11753616 + ... + 11755325.

It is an arithmetic number, because the mean of its divisors is an integer number (1528081230).

Almost surely, 2^20100144555 is an apocalyptic number.

20100144555 is a deficient number, since it is larger than the sum of its proper divisors (16573804965).

20100144555 is a wasteful number, since it uses less digits than its factorization.

20100144555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23508971 (or 23508968 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 20100144555 its reverse (55544100102), we get a palindrome (75644244657).

The spelling of 20100144555 in words is "twenty billion, one hundred million, one hundred forty-four thousand, five hundred fifty-five".