19861472 has 12 divisors (see below), whose sum is σ = 39102336. Its totient is φ = 9930720.

The previous prime is 19861463. The next prime is 19861481. The reversal of 19861472 is 27416891.

It is an interprime number because it is at equal distance from previous prime (19861463) and next prime (19861481).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310304 + ... + 310367.

It is an arithmetic number, because the mean of its divisors is an integer number (3258528).

Almost surely, 2^19861472 is an apocalyptic number.

It is an amenable number.

19861472 is a deficient number, since it is larger than the sum of its proper divisors (19240864).

19861472 is an equidigital number, since it uses as much as digits as its factorization.

19861472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620681 (or 620673 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 19861472 is about 4456.6211416274. The cubic root of 19861472 is about 270.8136043906.

The spelling of 19861472 in words is "nineteen million, eight hundred sixty-one thousand, four hundred seventy-two".