19518955960 has 192 divisors, whose sum is σ = 54307000800. Its totient is φ = 6295446528.

The previous prime is 19518955903. The next prime is 19518955961. The reversal of 19518955960 is 6955981591.

It is a junction number, because it is equal to n+sod(n) for n = 19518955895 and 19518955904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19518955961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9628467 + ... + 9630493.

Almost surely, 2^19518955960 is an apocalyptic number.

19518955960 is a gapful number since it is divisible by the number (10) 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 19518955960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27153500400).

19518955960 is an abundant number, since it is smaller than the sum of its proper divisors (34788044840).

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

19518955960 is a wasteful number, since it uses less digits than its factorization.

19518955960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 58.

The spelling of 19518955960 in words is "nineteen billion, five hundred eighteen million, nine hundred fifty-five thousand, nine hundred sixty".