19494371 has 4 divisors (see below), whose sum is σ = 20993952. Its totient is φ = 17994792.

The previous prime is 19494337. The next prime is 19494389. The reversal of 19494371 is 17349491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19494371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19494571) 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, 749771 + ... + 749796.

It is an arithmetic number, because the mean of its divisors is an integer number (5248488).

Almost surely, 2^19494371 is an apocalyptic number.

19494371 is a deficient number, since it is larger than the sum of its proper divisors (1499581).

19494371 is a wasteful number, since it uses less digits than its factorization.

19494371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499580.

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

The square root of 19494371 is about 4415.2430284187. The cubic root of 19494371 is about 269.1347288779.

The spelling of 19494371 in words is "nineteen million, four hundred ninety-four thousand, three hundred seventy-one".