21178424240038 has 8 divisors (see below), whose sum is σ = 34211300695488. Its totient is φ = 9774657341544.

The previous prime is 21178424240033. The next prime is 21178424240047. The reversal of 21178424240038 is 83004242487112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21178424240038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21178424240033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407277389206 + ... + 407277389257.

It is an arithmetic number, because the mean of its divisors is an integer number (4276412586936).

Almost surely, 2^{21178424240038} is an apocalyptic number.

21178424240038 is a deficient number, since it is larger than the sum of its proper divisors (13032876455450).

21178424240038 is a wasteful number, since it uses less digits than its factorization.

21178424240038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814554778478.

The product of its (nonzero) digits is 688128, while the sum is 46.

The spelling of 21178424240038 in words is "twenty-one trillion, one hundred seventy-eight billion, four hundred twenty-four million, two hundred forty thousand, thirty-eight".