39038260021 has 4 divisors (see below), whose sum is σ = 39119760000. Its totient is φ = 38956760044.

The previous prime is 39038260007. The next prime is 39038260043. The reversal of 39038260021 is 12006283093.

It is a happy number.

39038260021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39038260021 - 2¹⁹ = 39037735733 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 (39038260061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40749271 + ... + 40750228.

It is an arithmetic number, because the mean of its divisors is an integer number (9779940000).

Almost surely, 2^39038260021 is an apocalyptic number.

It is an amenable number.

39038260021 is a deficient number, since it is larger than the sum of its proper divisors (81499979).

39038260021 is an equidigital number, since it uses as much as digits as its factorization.

39038260021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81499978.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 39038260021 in words is "thirty-nine billion, thirty-eight million, two hundred sixty thousand, twenty-one".