19488218904 has 192 divisors, whose sum is σ = 65909376000. Its totient is φ = 5053800960.

The previous prime is 19488218887. The next prime is 19488218917. The reversal of 19488218904 is 40981288491.

It is a happy number.

It is a super-2 number, since 2×19488218904² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3983692 + ... + 3988580.

It is an arithmetic number, because the mean of its divisors is an integer number (343278000).

Almost surely, 2^19488218904 is an apocalyptic number.

19488218904 is a gapful number since it is divisible by the number (14) 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 19488218904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32954688000).

19488218904 is an abundant number, since it is smaller than the sum of its proper divisors (46421157096).

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

19488218904 is a wasteful number, since it uses less digits than its factorization.

19488218904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638 (or 5631 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 19488218904 in words is "nineteen billion, four hundred eighty-eight million, two hundred eighteen thousand, nine hundred four".