19381970 has 8 divisors (see below), whose sum is σ = 34887564. Its totient is φ = 7752784.

The previous prime is 19381963. The next prime is 19381979. The reversal of 19381970 is 7918391.

It can be written as a sum of positive squares in 2 ways, for example, as 19298449 + 83521 = 4393^2 + 289^2 .

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

It is a super-2 number, since 2×19381970² = 751321522161800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19381979) 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, 969089 + ... + 969108.

Almost surely, 2^19381970 is an apocalyptic number.

19381970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19381970 is a deficient number, since it is larger than the sum of its proper divisors (15505594).

19381970 is a wasteful number, since it uses less digits than its factorization.

19381970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938204.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 19381970 is about 4402.4958830191. The cubic root of 19381970 is about 268.6164708940.

The spelling of 19381970 in words is "nineteen million, three hundred eighty-one thousand, nine hundred seventy".