19880939 has 8 divisors (see below), whose sum is σ = 22669920. Its totient is φ = 17271936.

The previous prime is 19880933. The next prime is 19880963. The reversal of 19880939 is 93908891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19880939 - 2⁸ = 19880683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19880893 and 19880902.

It is not an unprimeable number, because it can be changed into a prime (19880933) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44759 + ... + 45200.

It is an arithmetic number, because the mean of its divisors is an integer number (2833740).

Almost surely, 2^19880939 is an apocalyptic number.

19880939 is a deficient number, since it is larger than the sum of its proper divisors (2788981).

19880939 is a wasteful number, since it uses less digits than its factorization.

19880939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89989.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 19880939 is about 4458.8046604443. The cubic root of 19880939 is about 270.9020538095.

The spelling of 19880939 in words is "nineteen million, eight hundred eighty thousand, nine hundred thirty-nine".