19768698381 has 8 divisors (see below), whose sum is σ = 26363739904. Its totient is φ = 13176394560.

The previous prime is 19768698373. The next prime is 19768698401. The reversal of 19768698381 is 18389686791.

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

It is not a de Polignac number, because 19768698381 - 2³ = 19768698373 is a prime.

It is a super-2 number, since 2×19768698381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19768698311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667516 + ... + 696501.

It is an arithmetic number, because the mean of its divisors is an integer number (3295467488).

Almost surely, 2^19768698381 is an apocalyptic number.

It is an amenable number.

19768698381 is a deficient number, since it is larger than the sum of its proper divisors (6595041523).

19768698381 is a wasteful number, since it uses less digits than its factorization.

19768698381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368851.

The product of its digits is 31352832, while the sum is 66.

The spelling of 19768698381 in words is "nineteen billion, seven hundred sixty-eight million, six hundred ninety-eight thousand, three hundred eighty-one".