11931020247 has 8 divisors (see below), whose sum is σ = 15913407744. Its totient is φ = 7951323128.

The previous prime is 11931020221. The next prime is 11931020263. The reversal of 11931020247 is 74202013911.

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

It is a cyclic number.

It is not a de Polignac number, because 11931020247 - 2¹¹ = 11931018199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11931027247) 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, 662223 + ... + 680000.

It is an arithmetic number, because the mean of its divisors is an integer number (1989175968).

Almost surely, 2^11931020247 is an apocalyptic number.

11931020247 is a deficient number, since it is larger than the sum of its proper divisors (3982387497).

11931020247 is a wasteful number, since it uses less digits than its factorization.

11931020247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345189.

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 11931020247 in words is "eleven billion, nine hundred thirty-one million, twenty thousand, two hundred forty-seven".