11397213850 has 72 divisors (see below), whose sum is σ = 23542610364. Its totient is φ = 4101504000.

The previous prime is 11397213803. The next prime is 11397213857. The reversal of 11397213850 is 5831279311.

It can be written as a sum of positive squares in 6 ways, for example, as 7420271881 + 3976941969 = 86141^2 + 63063^2 .

It is not an unprimeable number, because it can be changed into a prime (11397213857) 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 35 ways as a sum of consecutive naturals, for example, 577140 + ... + 596560.

Almost surely, 2^11397213850 is an apocalyptic number.

11397213850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11397213850 is an abundant number, since it is smaller than the sum of its proper divisors (12145396514).

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

11397213850 is a wasteful number, since it uses less digits than its factorization.

11397213850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19552 (or 19536 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 11397213850 in words is "eleven billion, three hundred ninety-seven million, two hundred thirteen thousand, eight hundred fifty".