19908592397 has 16 divisors (see below), whose sum is σ = 20334827520. Its totient is φ = 19487537472.

The previous prime is 19908592393. The next prime is 19908592409. The reversal of 19908592397 is 79329580991.

It is a cyclic number.

It is not a de Polignac number, because 19908592397 - 2² = 19908592393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19908592393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4988879 + ... + 4992867.

It is an arithmetic number, because the mean of its divisors is an integer number (1270926720).

Almost surely, 2^19908592397 is an apocalyptic number.

It is an amenable number.

19908592397 is a deficient number, since it is larger than the sum of its proper divisors (426235123).

19908592397 is a wasteful number, since it uses less digits than its factorization.

19908592397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612.

The product of its (nonzero) digits is 11022480, while the sum is 62.

The spelling of 19908592397 in words is "nineteen billion, nine hundred eight million, five hundred ninety-two thousand, three hundred ninety-seven".