39942021115 has 16 divisors (see below), whose sum is σ = 48081946752. Its totient is φ = 31852681344.

The previous prime is 39942021079. The next prime is 39942021121. The reversal of 39942021115 is 51112024993.

It is a cyclic number.

It is not a de Polignac number, because 39942021115 - 2¹⁹ = 39941496827 is a prime.

It is a super-2 number, since 2×39942021115² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7184917 + ... + 7190473.

It is an arithmetic number, because the mean of its divisors is an integer number (3005121672).

Almost surely, 2^39942021115 is an apocalyptic number.

39942021115 is a deficient number, since it is larger than the sum of its proper divisors (8139925637).

39942021115 is a wasteful number, since it uses less digits than its factorization.

39942021115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9846.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 39942021115 in words is "thirty-nine billion, nine hundred forty-two million, twenty-one thousand, one hundred fifteen".