19930938 has 16 divisors (see below), whose sum is σ = 40939680. Its totient is φ = 6464016.

The previous prime is 19930921. The next prime is 19930991. The reversal of 19930938 is 83903991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19930938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44668 + ... + 45111.

It is an arithmetic number, because the mean of its divisors is an integer number (2558730).

Almost surely, 2^19930938 is an apocalyptic number.

19930938 is an abundant number, since it is smaller than the sum of its proper divisors (21008742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19930938 is a wasteful number, since it uses less digits than its factorization.

19930938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89821.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 19930938 is about 4464.4079114705. The cubic root of 19930938 is about 271.1289628251.

The spelling of 19930938 in words is "nineteen million, nine hundred thirty thousand, nine hundred thirty-eight".