39920641922 has 18 divisors (see below), whose sum is σ = 69660898083. Its totient is φ = 17107998852.

The previous prime is 39920641883. The next prime is 39920641963. The reversal of 39920641922 is 22914602993.

It can be written as a sum of positive squares in only one way, i.e., 19960320961 + 19960320961 = 141281^2 + 141281^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=141281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1967843 + ... + 1988025.

Almost surely, 2^39920641922 is an apocalyptic number.

39920641922 is a deficient number, since it is larger than the sum of its proper divisors (29740256161).

39920641922 is an frugal number, since it uses more digits than its factorization.

39920641922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40382 (or 20192 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 39920641922 in words is "thirty-nine billion, nine hundred twenty million, six hundred forty-one thousand, nine hundred twenty-two".