19749243024 has 225 divisors, whose sum is σ = 64749268883. Its totient is φ = 5619031488.

The previous prime is 19749242977. The next prime is 19749243029. The reversal of 19749243024 is 42034294791.

The square root of 19749243024 is 140532.

It is a perfect power (a square), and thus also a powerful number.

19749243024 is a `hidden beast` number, since 197 + 4 + 9 + 2 + 430 + 24 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19749243029) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 82632697 + ... + 82632935.

Almost surely, 2^19749243024 is an apocalyptic number.

19749243024 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19749243024 is the 140532-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19749243024

19749243024 is an abundant number, since it is smaller than the sum of its proper divisors (45000025859).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19749243024 is an frugal number, since it uses more digits than its factorization.

19749243024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 19749243024 in words is "nineteen billion, seven hundred forty-nine million, two hundred forty-three thousand, twenty-four".