19018494 has 24 divisors (see below), whose sum is σ = 44953272. Its totient is φ = 5763120.

The previous prime is 19018463. The next prime is 19018507. The reversal of 19018494 is 49481091.

It is a super-2 number, since 2×19018494² = 723406228056072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47829 + ... + 48224.

It is an arithmetic number, because the mean of its divisors is an integer number (1873053).

Almost surely, 2^19018494 is an apocalyptic number.

19018494 is an abundant number, since it is smaller than the sum of its proper divisors (25934778).

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

19018494 is a wasteful number, since it uses less digits than its factorization.

19018494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96072 (or 96069 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 19018494 is about 4361.0198348551. The cubic root of 19018494 is about 266.9267147266.

The spelling of 19018494 in words is "nineteen million, eighteen thousand, four hundred ninety-four".