18619479072 has 120 divisors (see below), whose sum is σ = 54959177196. Its totient is φ = 6183848448.

The previous prime is 18619479037. The next prime is 18619479097. The reversal of 18619479072 is 27097491681.

18619479072 is a `hidden beast` number, since 18 + 619 + 4 + 7 + 9 + 0 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16693673616 + 1925805456 = 129204^2 + 43884^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 705018 + ... + 730950.

Almost surely, 2^18619479072 is an apocalyptic number.

18619479072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18619479072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27479588598).

18619479072 is an abundant number, since it is smaller than the sum of its proper divisors (36339698124).

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

18619479072 is a wasteful number, since it uses less digits than its factorization.

18619479072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232 (or 26215 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 18619479072 in words is "eighteen billion, six hundred nineteen million, four hundred seventy-nine thousand, seventy-two".