18581996097 has 48 divisors (see below), whose sum is σ = 31776675840. Its totient is φ = 10242777600.

The previous prime is 18581996071. The next prime is 18581996113. The reversal of 18581996097 is 79069918581.

18581996097 is a `hidden beast` number, since 1 + 8 + 5 + 8 + 19 + 9 + 609 + 7 = 666.

It is not a de Polignac number, because 18581996097 - 2¹⁶ = 18581930561 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 (18581991097) 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 47 ways as a sum of consecutive naturals, for example, 189472 + ... + 270302.

It is an arithmetic number, because the mean of its divisors is an integer number (662014080).

Almost surely, 2^18581996097 is an apocalyptic number.

It is an amenable number.

18581996097 is a deficient number, since it is larger than the sum of its proper divisors (13194679743).

18581996097 is a wasteful number, since it uses less digits than its factorization.

18581996097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80974 (or 80971 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 18581996097 in words is "eighteen billion, five hundred eighty-one million, nine hundred ninety-six thousand, ninety-seven".