19494258 has 48 divisors (see below), whose sum is σ = 46139904. Its totient is φ = 5473440.

The previous prime is 19494217. The next prime is 19494259. The reversal of 19494258 is 85249491.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19494259) 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 in 23 ways as a sum of consecutive naturals, for example, 17391 + ... + 18477.

It is an arithmetic number, because the mean of its divisors is an integer number (961248).

Almost surely, 2^19494258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19494258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23069952).

19494258 is an abundant number, since it is smaller than the sum of its proper divisors (26645646).

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

19494258 is a wasteful number, since it uses less digits than its factorization.

19494258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1160 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 19494258 is about 4415.2302318226. The cubic root of 19494258 is about 269.1342088597.

It can be divided in two parts, 194942 and 58, that added together give a triangular number (195000 = T₆₂₄).

The spelling of 19494258 in words is "nineteen million, four hundred ninety-four thousand, two hundred fifty-eight".