19449835497 has 24 divisors (see below), whose sum is σ = 28336548864. Its totient is φ = 12854860704.

The previous prime is 19449835477. The next prime is 19449835499. The reversal of 19449835497 is 79453894491.

19449835497 is a `hidden beast` number, since 1 + 9 + 4 + 4 + 9 + 83 + 549 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-19449835497 is a prime.

It is a super-2 number, since 2×19449835497² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19449835499) 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, 1735203 + ... + 1746375.

It is an arithmetic number, because the mean of its divisors is an integer number (1180689536).

Almost surely, 2^19449835497 is an apocalyptic number.

It is an amenable number.

19449835497 is a deficient number, since it is larger than the sum of its proper divisors (8886713367).

19449835497 is a wasteful number, since it uses less digits than its factorization.

19449835497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12829 (or 12826 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 19449835497 in words is "nineteen billion, four hundred forty-nine million, eight hundred thirty-five thousand, four hundred ninety-seven".