11020402555 has 4 divisors (see below), whose sum is σ = 13224483072. Its totient is φ = 8816322040.

The previous prime is 11020402543. The next prime is 11020402559. The reversal of 11020402555 is 55520402011.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11020402555 - 2⁷ = 11020402427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020402559) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1102040251 + ... + 1102040260.

It is an arithmetic number, because the mean of its divisors is an integer number (3306120768).

Almost surely, 2^11020402555 is an apocalyptic number.

11020402555 is a deficient number, since it is larger than the sum of its proper divisors (2204080517).

11020402555 is an equidigital number, since it uses as much as digits as its factorization.

11020402555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204080516.

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 11020402555 its reverse (55520402011), we get a palindrome (66540804566).

The spelling of 11020402555 in words is "eleven billion, twenty million, four hundred two thousand, five hundred fifty-five".