19243987970 has 8 divisors (see below), whose sum is σ = 34639178364. Its totient is φ = 7697595184.

The previous prime is 19243987969. The next prime is 19243987999. The reversal of 19243987970 is 7978934291.

It can be written as a sum of positive squares in 2 ways, for example, as 19115551081 + 128436889 = 138259^2 + 11333^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962199389 + ... + 962199408.

Almost surely, 2^19243987970 is an apocalyptic number.

19243987970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19243987970 is a deficient number, since it is larger than the sum of its proper divisors (15395190394).

19243987970 is a wasteful number, since it uses less digits than its factorization.

19243987970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924398804.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 19243987970 in words is "nineteen billion, two hundred forty-three million, nine hundred eighty-seven thousand, nine hundred seventy".