19908776097 has 96 divisors (see below), whose sum is σ = 34313760000. Its totient is φ = 11115175680.

The previous prime is 19908776093. The next prime is 19908776117. The reversal of 19908776097 is 79067780991.

19908776097 is a `hidden beast` number, since 19 + 9 + 0 + 8 + 7 + 7 + 609 + 7 = 666.

It is not a de Polignac number, because 19908776097 - 2² = 19908776093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (19908776093) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51179179 + ... + 51179567.

It is an arithmetic number, because the mean of its divisors is an integer number (357435000).

Almost surely, 2^19908776097 is an apocalyptic number.

It is an amenable number.

19908776097 is a deficient number, since it is larger than the sum of its proper divisors (14404983903).

19908776097 is a wasteful number, since it uses less digits than its factorization.

19908776097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 63.

The spelling of 19908776097 in words is "nineteen billion, nine hundred eight million, seven hundred seventy-six thousand, ninety-seven".