11921724393 has 8 divisors (see below), whose sum is σ = 15907893408. Its totient is φ = 7941685824.

The previous prime is 11921724383. The next prime is 11921724403. The reversal of 11921724393 is 39342712911.

It is an interprime number because it is at equal distance from previous prime (11921724383) and next prime (11921724403).

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

It is not a de Polignac number, because 11921724393 - 2⁵ = 11921724361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11921724313) 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, 1528071 + ... + 1535852.

It is an arithmetic number, because the mean of its divisors is an integer number (1988486676).

Almost surely, 2^11921724393 is an apocalyptic number.

It is an amenable number.

11921724393 is a deficient number, since it is larger than the sum of its proper divisors (3986169015).

11921724393 is a wasteful number, since it uses less digits than its factorization.

11921724393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065223.

The product of its digits is 81648, while the sum is 42.

The spelling of 11921724393 in words is "eleven billion, nine hundred twenty-one million, seven hundred twenty-four thousand, three hundred ninety-three".