11213539236 has 189 divisors, whose sum is σ = 30820071891. Its totient is φ = 3568204224.

The previous prime is 11213539229. The next prime is 11213539277. The reversal of 11213539236 is 63293531211.

The square root of 11213539236 is 105894.

It is a perfect power (a square), and thus also a powerful number.

11213539236 is a `hidden beast` number, since 112 + 1 + 3 + 539 + 2 + 3 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4476412836 + 6737126400 = 66906^2 + 82080^2 .

It is a super-2 number, since 2×11213539236² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11213539236.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 211576186 + ... + 211576238.

Almost surely, 2^11213539236 is an apocalyptic number.

11213539236 is the 105894-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11213539236

11213539236 is an abundant number, since it is smaller than the sum of its proper divisors (19606532655).

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

11213539236 is an frugal number, since it uses more digits than its factorization.

11213539236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 95 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

Multiplying 11213539236 by its sum of digits (36), we get a square (403687412496 = 635364²).

11213539236 divided by its sum of digits (36) gives a square (311487201 = 17649²).

The spelling of 11213539236 in words is "eleven billion, two hundred thirteen million, five hundred thirty-nine thousand, two hundred thirty-six".