11218969851 has 32 divisors (see below), whose sum is σ = 16392414528. Its totient is φ = 6796738560.

The previous prime is 11218969819. The next prime is 11218969873. The reversal of 11218969851 is 15896981211.

It is not a de Polignac number, because 11218969851 - 2⁵ = 11218969819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 11218969794 and 11218969803.

It is not an unprimeable number, because it can be changed into a prime (11218969891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175171 + ... + 230483.

It is an arithmetic number, because the mean of its divisors is an integer number (512262954).

Almost surely, 2^11218969851 is an apocalyptic number.

11218969851 is a deficient number, since it is larger than the sum of its proper divisors (5173444677).

11218969851 is a wasteful number, since it uses less digits than its factorization.

11218969851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55471.

The product of its digits is 311040, while the sum is 51.

The spelling of 11218969851 in words is "eleven billion, two hundred eighteen million, nine hundred sixty-nine thousand, eight hundred fifty-one".