19243939 has 16 divisors (see below), whose sum is σ = 23595264. Its totient is φ = 15444000.

The previous prime is 19243937. The next prime is 19243951. The reversal of 19243939 is 93934291.

It is not a de Polignac number, because 19243939 - 2¹ = 19243937 is a prime.

19243939 is a modest number, since divided by 3939 gives 1924 as remainder.

It is not an unprimeable number, because it can be changed into a prime (19243933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364 + ... + 6214.

It is an arithmetic number, because the mean of its divisors is an integer number (1474704).

Almost surely, 2^19243939 is an apocalyptic number.

19243939 is a deficient number, since it is larger than the sum of its proper divisors (4351325).

19243939 is a wasteful number, since it uses less digits than its factorization.

19243939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898.

The product of its digits is 52488, while the sum is 40.

The square root of 19243939 is about 4386.7914242644. The cubic root of 19243939 is about 267.9772897887.

The spelling of 19243939 in words is "nineteen million, two hundred forty-three thousand, nine hundred thirty-nine".