18717729097796 has 24 divisors (see below), whose sum is σ = 32852670548544. Its totient is φ = 9331283451680.

The previous prime is 18717729097729. The next prime is 18717729097799. The reversal of 18717729097796 is 69779092771781.

It is a self number, because there is not a number n which added to its sum of digits gives 18717729097796.

It is not an unprimeable number, because it can be changed into a prime (18717729097799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589960 + ... + 6321663.

It is an arithmetic number, because the mean of its divisors is an integer number (1368861272856).

Almost surely, 2^{18717729097796} is an apocalyptic number.

It is an amenable number.

18717729097796 is a deficient number, since it is larger than the sum of its proper divisors (14134941450748).

18717729097796 is a wasteful number, since it uses less digits than its factorization.

18717729097796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7913371 (or 7913369 counting only the distinct ones).

The product of its (nonzero) digits is 1176221088, while the sum is 80.

The spelling of 18717729097796 in words is "eighteen trillion, seven hundred seventeen billion, seven hundred twenty-nine million, ninety-seven thousand, seven hundred ninety-six".