19862956097 has 8 divisors (see below), whose sum is σ = 20282032776. Its totient is φ = 19447852032.

The previous prime is 19862956093. The next prime is 19862956129. The reversal of 19862956097 is 79065926891.

It is a Cunningham number, because it is equal to 140936²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 477684736 + 19385271361 = 21856^2 + 139231^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19862956097 - 2² = 19862956093 is a prime.

It is a super-2 number, since 2×19862956097² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19862956093) 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, 983048 + ... + 1003049.

It is an arithmetic number, because the mean of its divisors is an integer number (2535254097).

Almost surely, 2^19862956097 is an apocalyptic number.

It is an amenable number.

19862956097 is a deficient number, since it is larger than the sum of its proper divisors (419076679).

19862956097 is a wasteful number, since it uses less digits than its factorization.

19862956097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986307.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 19862956097 in words is "nineteen billion, eight hundred sixty-two million, nine hundred fifty-six thousand, ninety-seven".