11387531012 has 48 divisors (see below), whose sum is σ = 24430073472. Its totient is φ = 4570241280.

The previous prime is 11387531009. The next prime is 11387531021. The reversal of 11387531012 is 21013578311.

It is a self number, because there is not a number n which added to its sum of digits gives 11387531012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419633 + ... + 445944.

It is an arithmetic number, because the mean of its divisors is an integer number (508959864).

Almost surely, 2^11387531012 is an apocalyptic number.

It is an amenable number.

11387531012 is an abundant number, since it is smaller than the sum of its proper divisors (13042542460).

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

11387531012 is a wasteful number, since it uses less digits than its factorization.

11387531012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865628 (or 865626 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 11387531012 in words is "eleven billion, three hundred eighty-seven million, five hundred thirty-one thousand, twelve".