38338181621 has 4 divisors (see below), whose sum is σ = 38530836000. Its totient is φ = 38145527244.

The previous prime is 38338181611. The next prime is 38338181639. The reversal of 38338181621 is 12618183383.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38338181621 - 2¹⁴ = 38338165237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38338181611) 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 3 ways as a sum of consecutive naturals, for example, 96326891 + ... + 96327288.

It is an arithmetic number, because the mean of its divisors is an integer number (9632709000).

Almost surely, 2^38338181621 is an apocalyptic number.

It is an amenable number.

38338181621 is a deficient number, since it is larger than the sum of its proper divisors (192654379).

38338181621 is a wasteful number, since it uses less digits than its factorization.

38338181621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192654378.

The product of its digits is 165888, while the sum is 44.

The spelling of 38338181621 in words is "thirty-eight billion, three hundred thirty-eight million, one hundred eighty-one thousand, six hundred twenty-one".