19138996 has 6 divisors (see below), whose sum is σ = 33493250. Its totient is φ = 9569496.

The previous prime is 19138993. The next prime is 19139009. The reversal of 19138996 is 69983191.

It can be written as a sum of positive squares in only one way, i.e., 17139600 + 1999396 = 4140^2 + 1414^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2392371 + ... + 2392378.

Almost surely, 2^19138996 is an apocalyptic number.

It is an amenable number.

19138996 is a deficient number, since it is larger than the sum of its proper divisors (14354254).

19138996 is a wasteful number, since it uses less digits than its factorization.

19138996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784753 (or 4784751 counting only the distinct ones).

The product of its digits is 104976, while the sum is 46.

The square root of 19138996 is about 4374.8138246101. The cubic root of 19138996 is about 267.4892813127.

The spelling of 19138996 in words is "nineteen million, one hundred thirty-eight thousand, nine hundred ninety-six".