19763138 has 4 divisors (see below), whose sum is σ = 29644710. Its totient is φ = 9881568.

The previous prime is 19763131. The next prime is 19763167. The reversal of 19763138 is 83136791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 779689 = 4357^2 + 883^2 .

It is not an unprimeable number, because it can be changed into a prime (19763131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940783 + ... + 4940786.

Almost surely, 2^19763138 is an apocalyptic number.

19763138 is a deficient number, since it is larger than the sum of its proper divisors (9881572).

19763138 is an equidigital number, since it uses as much as digits as its factorization.

19763138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881571.

The product of its digits is 27216, while the sum is 38.

The square root of 19763138 is about 4445.5751034034. The cubic root of 19763138 is about 270.3659327230.

The spelling of 19763138 in words is "nineteen million, seven hundred sixty-three thousand, one hundred thirty-eight".