19474242618 has 8 divisors (see below), whose sum is σ = 38948485248. Its totient is φ = 6491414204.

The previous prime is 19474242617. The next prime is 19474242643. The reversal of 19474242618 is 81624247491.

It is a sphenic number, since it is the product of 3 distinct primes.

19474242618 is an admirable number.

It is a super-2 number, since 2×19474242618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19474242617) 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, 1622853546 + ... + 1622853557.

It is an arithmetic number, because the mean of its divisors is an integer number (4868560656).

Almost surely, 2^19474242618 is an apocalyptic number.

19474242618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19474242618 is a wasteful number, since it uses less digits than its factorization.

19474242618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245707108.

The product of its digits is 774144, while the sum is 48.

The spelling of 19474242618 in words is "nineteen billion, four hundred seventy-four million, two hundred forty-two thousand, six hundred eighteen".