19618503948 has 72 divisors (see below), whose sum is σ = 52698364992. Its totient is φ = 6132552192.

The previous prime is 19618503907. The next prime is 19618503991. The reversal of 19618503948 is 84930581691.

19618503948 is a `hidden beast` number, since 1 + 96 + 1 + 8 + 503 + 9 + 48 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19618503894 and 19618503903.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111661 + ... + 227387.

It is an arithmetic number, because the mean of its divisors is an integer number (731921736).

Almost surely, 2^19618503948 is an apocalyptic number.

19618503948 is a gapful number since it is divisible by the number (18) 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 19618503948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26349182496).

19618503948 is an abundant number, since it is smaller than the sum of its proper divisors (33079861044).

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

19618503948 is a wasteful number, since it uses less digits than its factorization.

19618503948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116031 (or 116026 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 19618503948 in words is "nineteen billion, six hundred eighteen million, five hundred three thousand, nine hundred forty-eight".