19970106659 has 8 divisors (see below), whose sum is σ = 20737747968. Its totient is φ = 19210180680.

The previous prime is 19970106641. The next prime is 19970106679. The reversal of 19970106659 is 95660107991.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19970106659 is a prime.

It is a super-2 number, since 2×19970106659² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19970106659.

It is not an unprimeable number, because it can be changed into a prime (19970106679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1923557 + ... + 1933910.

It is an arithmetic number, because the mean of its divisors is an integer number (2592218496).

Almost surely, 2^19970106659 is an apocalyptic number.

19970106659 is a deficient number, since it is larger than the sum of its proper divisors (767641309).

19970106659 is a wasteful number, since it uses less digits than its factorization.

19970106659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857665.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 19970106659 in words is "nineteen billion, nine hundred seventy million, one hundred six thousand, six hundred fifty-nine".