19700471097 has 24 divisors (see below), whose sum is σ = 30167565480. Its totient is φ = 12345722880.

The previous prime is 19700471071. The next prime is 19700471207. The reversal of 19700471097 is 79017400791.

19700471097 is a `hidden beast` number, since 1 + 97 + 0 + 0 + 471 + 0 + 97 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14097050361 + 5603420736 = 118731^2 + 74856^2 .

It is not a de Polignac number, because 19700471097 - 2⁷ = 19700470969 is a prime.

It is a super-2 number, since 2×19700471097² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19700471017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44197 + ... + 203357.

It is an arithmetic number, because the mean of its divisors is an integer number (1256981895).

Almost surely, 2^19700471097 is an apocalyptic number.

19700471097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19700471097 is a deficient number, since it is larger than the sum of its proper divisors (10467094383).

19700471097 is a wasteful number, since it uses less digits than its factorization.

19700471097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159993 (or 159990 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 45.

The spelling of 19700471097 in words is "nineteen billion, seven hundred million, four hundred seventy-one thousand, ninety-seven".