19813699328 has 18 divisors (see below), whose sum is σ = 39550001904. Its totient is φ = 9906849536.

The previous prime is 19813699309. The next prime is 19813699331. The reversal of 19813699328 is 82399631891.

It is a super-3 number, since 3×19813699328³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38698376 + ... + 38698887.

It is an arithmetic number, because the mean of its divisors is an integer number (2197222328).

Almost surely, 2^19813699328 is an apocalyptic number.

It is an amenable number.

19813699328 is a deficient number, since it is larger than the sum of its proper divisors (19736302576).

19813699328 is an frugal number, since it uses more digits than its factorization.

19813699328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77397279 (or 77397265 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 59.

The spelling of 19813699328 in words is "nineteen billion, eight hundred thirteen million, six hundred ninety-nine thousand, three hundred twenty-eight".