19897659614 has 24 divisors (see below), whose sum is σ = 34763636520. Its totient is φ = 8516699856.

The previous prime is 19897659577. The next prime is 19897659619. The reversal of 19897659614 is 41695679891.

It is a super-2 number, since 2×19897659614² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19897659619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51869 + ... + 206120.

It is an arithmetic number, because the mean of its divisors is an integer number (1448484855).

Almost surely, 2^19897659614 is an apocalyptic number.

19897659614 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19897659614 is a deficient number, since it is larger than the sum of its proper divisors (14865976906).

19897659614 is a wasteful number, since it uses less digits than its factorization.

19897659614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258792 (or 258785 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 65.

The spelling of 19897659614 in words is "nineteen billion, eight hundred ninety-seven million, six hundred fifty-nine thousand, six hundred fourteen".