21838403403 has 48 divisors (see below), whose sum is σ = 32992521120. Its totient is φ = 13906847232.

The previous prime is 21838403401. The next prime is 21838403417. The reversal of 21838403403 is 30430483812.

It is a happy number.

21838403403 is a `hidden beast` number, since 218 + 38 + 4 + 0 + 3 + 403 = 666.

It is not a de Polignac number, because 21838403403 - 2¹ = 21838403401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21838403401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5564800 + ... + 5568722.

It is an arithmetic number, because the mean of its divisors is an integer number (687344190).

Almost surely, 2^21838403403 is an apocalyptic number.

21838403403 is a deficient number, since it is larger than the sum of its proper divisors (11154117717).

21838403403 is a wasteful number, since it uses less digits than its factorization.

21838403403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268 (or 4265 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 21838403403 in words is "twenty-one billion, eight hundred thirty-eight million, four hundred three thousand, four hundred three".