19206939 has 8 divisors (see below), whose sum is σ = 26204992. Its totient is φ = 12506760.

The previous prime is 19206931. The next prime is 19207003. The reversal of 19206939 is 93960291.

It is a happy number.

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

It is not a de Polignac number, because 19206939 - 2³ = 19206931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19206897 and 19206906.

It is not an unprimeable number, because it can be changed into a prime (19206931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74317 + ... + 74574.

It is an arithmetic number, because the mean of its divisors is an integer number (3275624).

Almost surely, 2^19206939 is an apocalyptic number.

19206939 is a deficient number, since it is larger than the sum of its proper divisors (6998053).

19206939 is a wasteful number, since it uses less digits than its factorization.

19206939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148937.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 19206939 is about 4382.5721899360. The cubic root of 19206939 is about 267.8054344478.

The spelling of 19206939 in words is "nineteen million, two hundred six thousand, nine hundred thirty-nine".