19447189730970 has 128 divisors (see below), whose sum is σ = 49611920117760. Its totient is φ = 4864980326400.

The previous prime is 19447189730821. The next prime is 19447189730999. The reversal of 19447189730970 is 7903798174491.

It is a junction number, because it is equal to n+sod(n) for n = 19447189730895 and 19447189730904.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24646570 + ... + 25423370.

It is an arithmetic number, because the mean of its divisors is an integer number (387593125920).

Almost surely, 2^{19447189730970} is an apocalyptic number.

19447189730970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19447189730970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24805960058880).

19447189730970 is an abundant number, since it is smaller than the sum of its proper divisors (30164730386790).

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

19447189730970 is a wasteful number, since it uses less digits than its factorization.

19447189730970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777260.

The product of its (nonzero) digits is 96018048, while the sum is 69.

The spelling of 19447189730970 in words is "nineteen trillion, four hundred forty-seven billion, one hundred eighty-nine million, seven hundred thirty thousand, nine hundred seventy".