19403375616 has 99 divisors (see below), whose sum is σ = 56065465183. Its totient is φ = 6463334400.

The previous prime is 19403375611. The next prime is 19403375617. The reversal of 19403375616 is 61657330491.

It is a happy number.

The square root of 19403375616 is 139296.

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

19403375616 is a `hidden beast` number, since 19 + 40 + 3 + 37 + 561 + 6 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19403375611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13371691 + ... + 13373141.

Almost surely, 2^19403375616 is an apocalyptic number.

19403375616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19403375616 is the 139296-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19403375616

19403375616 is an abundant number, since it is smaller than the sum of its proper divisors (36662089567).

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

19403375616 is an frugal number, since it uses more digits than its factorization.

19403375616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 19403375616 in words is "nineteen billion, four hundred three million, three hundred seventy-five thousand, six hundred sixteen".