11403640821 has 8 divisors (see below), whose sum is σ = 15575704704. Its totient is φ = 7417002080.

The previous prime is 11403640819. The next prime is 11403640841. The reversal of 11403640821 is 12804630411.

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 11403640821 - 2¹ = 11403640819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403640841) 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, 46356141 + ... + 46356386.

It is an arithmetic number, because the mean of its divisors is an integer number (1946963088).

Almost surely, 2^11403640821 is an apocalyptic number.

It is an amenable number.

11403640821 is a deficient number, since it is larger than the sum of its proper divisors (4172063883).

11403640821 is an equidigital number, since it uses as much as digits as its factorization.

11403640821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92712571.

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 11403640821 in words is "eleven billion, four hundred three million, six hundred forty thousand, eight hundred twenty-one".