19447970 has 8 divisors (see below), whose sum is σ = 35006364. Its totient is φ = 7779184.

The previous prime is 19447969. The next prime is 19447973. The reversal of 19447970 is 7974491.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18809569 + 638401 = 4337^2 + 799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (19447973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972389 + ... + 972408.

Almost surely, 2^19447970 is an apocalyptic number.

19447970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19447970 is a deficient number, since it is larger than the sum of its proper divisors (15558394).

19447970 is a wasteful number, since it uses less digits than its factorization.

19447970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944804.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 19447970 is about 4409.9852607463. The cubic root of 19447970 is about 268.9210254476.

The spelling of 19447970 in words is "nineteen million, four hundred forty-seven thousand, nine hundred seventy".