39242079921 has 16 divisors (see below), whose sum is σ = 57883327488. Its totient is φ = 23448104400.

The previous prime is 39242079907. The next prime is 39242079923. The reversal of 39242079921 is 12997024293.

It is not a de Polignac number, because 39242079921 - 2⁵ = 39242079889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39242079923) 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, 8371981 + ... + 8376666.

It is an arithmetic number, because the mean of its divisors is an integer number (3617707968).

Almost surely, 2^39242079921 is an apocalyptic number.

It is an amenable number.

39242079921 is a deficient number, since it is larger than the sum of its proper divisors (18641247567).

39242079921 is a wasteful number, since it uses less digits than its factorization.

39242079921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16748732.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 39242079921 in words is "thirty-nine billion, two hundred forty-two million, seventy-nine thousand, nine hundred twenty-one".