11389021800 has 768 divisors, whose sum is σ = 43063910400. Its totient is φ = 2463436800.

The previous prime is 11389021789. The next prime is 11389021801. The reversal of 11389021800 is 812098311.

It is not an unprimeable number, because it can be changed into a prime (11389021801) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 169985367 + ... + 169985433.

It is an arithmetic number, because the mean of its divisors is an integer number (56072800).

Almost surely, 2^11389021800 is an apocalyptic number.

11389021800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11389021800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21531955200).

11389021800 is an abundant number, since it is smaller than the sum of its proper divisors (31674888600).

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

11389021800 is a wasteful number, since it uses less digits than its factorization.

11389021800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The spelling of 11389021800 in words is "eleven billion, three hundred eighty-nine million, twenty-one thousand, eight hundred".