20113103555 has 16 divisors (see below), whose sum is σ = 25072502400. Its totient is φ = 15470609280.

The previous prime is 20113103533. The next prime is 20113103573. The reversal of 20113103555 is 55530131102.

It is a happy number.

It is not a de Polignac number, because 20113103555 - 2¹⁰ = 20113102531 is a prime.

It is a super-2 number, since 2×20113103555² (a number of 21 digits) contains 22 as substring.

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, 255536 + ... + 324845.

It is an arithmetic number, because the mean of its divisors is an integer number (1567031400).

Almost surely, 2^20113103555 is an apocalyptic number.

20113103555 is a deficient number, since it is larger than the sum of its proper divisors (4959398845).

20113103555 is a wasteful number, since it uses less digits than its factorization.

20113103555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580654.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 20113103555 its reverse (55530131102), we get a palindrome (75643234657).

The spelling of 20113103555 in words is "twenty billion, one hundred thirteen million, one hundred three thousand, five hundred fifty-five".