19700097365531 has 4 divisors (see below), whose sum is σ = 21491015307864. Its totient is φ = 17909179423200.

The previous prime is 19700097365503. The next prime is 19700097365561. The reversal of 19700097365531 is 13556379000791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19700097365531 - 2²⁶ = 19700030256667 is a prime.

It is a super-2 number, since 2×19700097365531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19700097365561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895458971150 + ... + 895458971171.

It is an arithmetic number, because the mean of its divisors is an integer number (5372753826966).

Almost surely, 2^{19700097365531} is an apocalyptic number.

19700097365531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19700097365531 is a deficient number, since it is larger than the sum of its proper divisors (1790917942333).

19700097365531 is a wasteful number, since it uses less digits than its factorization.

19700097365531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790917942332.

The product of its (nonzero) digits is 5358150, while the sum is 56.

The spelling of 19700097365531 in words is "nineteen trillion, seven hundred billion, ninety-seven million, three hundred sixty-five thousand, five hundred thirty-one".