11087213820 has 48 divisors (see below), whose sum is σ = 31281199488. Its totient is φ = 2934018880.

The previous prime is 11087213803. The next prime is 11087213827. The reversal of 11087213820 is 2831278011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11087213827) by changing a digit.

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, 697434 + ... + 713153.

It is an arithmetic number, because the mean of its divisors is an integer number (651691656).

Almost surely, 2^11087213820 is an apocalyptic number.

11087213820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11087213820 is an abundant number, since it is smaller than the sum of its proper divisors (20193985668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11087213820 is a wasteful number, since it uses less digits than its factorization.

11087213820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410730 (or 1410728 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 11087213820 in words is "eleven billion, eighty-seven million, two hundred thirteen thousand, eight hundred twenty".