19138463 has 4 divisors (see below), whose sum is σ = 19798440. Its totient is φ = 18478488.

The previous prime is 19138433. The next prime is 19138487. The reversal of 19138463 is 36483191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36483191 = 139 ⋅262469.

It is a cyclic number.

It is not a de Polignac number, because 19138463 - 2¹⁴ = 19122079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329945 + ... + 330002.

It is an arithmetic number, because the mean of its divisors is an integer number (4949610).

Almost surely, 2^19138463 is an apocalyptic number.

19138463 is a deficient number, since it is larger than the sum of its proper divisors (659977).

19138463 is an equidigital number, since it uses as much as digits as its factorization.

19138463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659976.

The product of its digits is 15552, while the sum is 35.

The square root of 19138463 is about 4374.7529073080. The cubic root of 19138463 is about 267.4867981955.

The spelling of 19138463 in words is "nineteen million, one hundred thirty-eight thousand, four hundred sixty-three".