11913093921 has 16 divisors (see below), whose sum is σ = 16223483520. Its totient is φ = 7773118080.

The previous prime is 11913093919. The next prime is 11913093923. The reversal of 11913093921 is 12939031911.

It is an interprime number because it is at equal distance from previous prime (11913093919) and next prime (11913093923).

It is not a de Polignac number, because 11913093921 - 2¹ = 11913093919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11913093921.

It is not an unprimeable number, because it can be changed into a prime (11913093923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26565 + ... + 156626.

It is an arithmetic number, because the mean of its divisors is an integer number (1013967720).

Almost surely, 2^11913093921 is an apocalyptic number.

It is an amenable number.

11913093921 is a deficient number, since it is larger than the sum of its proper divisors (4310389599).

11913093921 is a wasteful number, since it uses less digits than its factorization.

11913093921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183656.

The product of its (nonzero) digits is 13122, while the sum is 39.

The spelling of 11913093921 in words is "eleven billion, nine hundred thirteen million, ninety-three thousand, nine hundred twenty-one".