19247930 has 16 divisors (see below), whose sum is σ = 37311624. Its totient is φ = 7106880.

The previous prime is 19247911. The next prime is 19247933. The reversal of 19247930 is 3974291.

It can be written as a sum of positive squares in 4 ways, for example, as 8743849 + 10504081 = 2957^2 + 3241^2 .

It is not an unprimeable number, because it can be changed into a prime (19247933) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 73901 + ... + 74160.

Almost surely, 2^19247930 is an apocalyptic number.

19247930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19247930 is a deficient number, since it is larger than the sum of its proper divisors (18063694).

19247930 is a wasteful number, since it uses less digits than its factorization.

19247930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148081.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 19247930 is about 4387.2462889608. The cubic root of 19247930 is about 267.9958137759.

The spelling of 19247930 in words is "nineteen million, two hundred forty-seven thousand, nine hundred thirty".