19315449000 has 512 divisors, whose sum is σ = 70734643200. Its totient is φ = 4868640000.

The previous prime is 19315448989. The next prime is 19315449007. The reversal of 19315449000 is 94451391.

It is a happy number.

19315449000 is a `hidden beast` number, since 19 + 3 + 154 + 490 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19315449007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 39338755 + ... + 39339245.

It is an arithmetic number, because the mean of its divisors is an integer number (138153600).

Almost surely, 2^19315449000 is an apocalyptic number.

19315449000 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 19315449000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35367321600).

19315449000 is an abundant number, since it is smaller than the sum of its proper divisors (51419194200).

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

19315449000 is a wasteful number, since it uses less digits than its factorization.

19315449000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 19315449000 in words is "nineteen billion, three hundred fifteen million, four hundred forty-nine thousand".