19481385400 has 48 divisors (see below), whose sum is σ = 45303841440. Its totient is φ = 7790899200.

The previous prime is 19481385379. The next prime is 19481385403. The reversal of 19481385400 is 458318491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19481385403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1442680 + ... + 1456120.

It is an arithmetic number, because the mean of its divisors is an integer number (943830030).

Almost surely, 2^19481385400 is an apocalyptic number.

19481385400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19481385400 is an abundant number, since it is smaller than the sum of its proper divisors (25822456040).

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

19481385400 is a wasteful number, since it uses less digits than its factorization.

19481385400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20704 (or 20695 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 19481385400 in words is "nineteen billion, four hundred eighty-one million, three hundred eighty-five thousand, four hundred".