19018642 has 16 divisors (see below), whose sum is σ = 29332512. Its totient is φ = 9243360.

The previous prime is 19018621. The next prime is 19018663. The reversal of 19018642 is 24681091.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19018621) and next prime (19018663).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23773 + ... + 24559.

It is an arithmetic number, because the mean of its divisors is an integer number (1833282).

Almost surely, 2^19018642 is an apocalyptic number.

19018642 is a deficient number, since it is larger than the sum of its proper divisors (10313870).

19018642 is a wasteful number, since it uses less digits than its factorization.

19018642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 19018642 is about 4361.0368033301. The cubic root of 19018642 is about 266.9274071237.

The spelling of 19018642 in words is "nineteen million, eighteen thousand, six hundred forty-two".