20155110055 has 32 divisors (see below), whose sum is σ = 25248024000. Its totient is φ = 15426819072.

The previous prime is 20155110023. The next prime is 20155110061. The reversal of 20155110055 is 55001155102.

It is a cyclic number.

It is not a de Polignac number, because 20155110055 - 2⁵ = 20155110023 is a prime.

It is a super-2 number, since 2×20155110055² (a number of 21 digits) contains 22 as substring.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 12162787 + ... + 12164443.

It is an arithmetic number, because the mean of its divisors is an integer number (789000750).

Almost surely, 2^20155110055 is an apocalyptic number.

20155110055 is a deficient number, since it is larger than the sum of its proper divisors (5092913945).

20155110055 is a wasteful number, since it uses less digits than its factorization.

20155110055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403.

The product of its (nonzero) digits is 1250, while the sum is 25.

Adding to 20155110055 its reverse (55001155102), we get a palindrome (75156265157).

The spelling of 20155110055 in words is "twenty billion, one hundred fifty-five million, one hundred ten thousand, fifty-five".