12533381387 has 8 divisors (see below), whose sum is σ = 12750696000. Its totient is φ = 12316229704.

The previous prime is 12533381347. The next prime is 12533381411. The reversal of 12533381387 is 78318333521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12533381387 - 2⁶ = 12533381323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12533381347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119888 + ... + 198594.

It is an arithmetic number, because the mean of its divisors is an integer number (1593837000).

Almost surely, 2^12533381387 is an apocalyptic number.

12533381387 is a deficient number, since it is larger than the sum of its proper divisors (217314613).

12533381387 is an equidigital number, since it uses as much as digits as its factorization.

12533381387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81465.

The product of its digits is 362880, while the sum is 44.

The spelling of 12533381387 in words is "twelve billion, five hundred thirty-three million, three hundred eighty-one thousand, three hundred eighty-seven".