19499329600 has 63 divisors (see below), whose sum is σ = 47994285901. Its totient is φ = 7797497600.

The previous prime is 19499329573. The next prime is 19499329627. The reversal of 19499329600 is 692399491.

The square root of 19499329600 is 139640.

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

It is an interprime number because it is at equal distance from previous prime (19499329573) and next prime (19499329627).

It can be written as a sum of positive squares in only one way, i.e., 7019758656 + 12479570944 = 83784^2 + 111712^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5583855 + ... + 5587345.

Almost surely, 2^19499329600 is an apocalyptic number.

19499329600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19499329600 is the 139640-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19499329600

19499329600 is an abundant number, since it is smaller than the sum of its proper divisors (28494956301).

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

19499329600 is an frugal number, since it uses more digits than its factorization.

19499329600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 52.

The spelling of 19499329600 in words is "nineteen billion, four hundred ninety-nine million, three hundred twenty-nine thousand, six hundred".