18910998868607 has 8 divisors (see below), whose sum is σ = 18913835613456. Its totient is φ = 18908162333632.

The previous prime is 18910998868603. The next prime is 18910998868637. The reversal of 18910998868607 is 70686889901981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18910998868607 - 2² = 18910998868603 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 (18910998868603) 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, 283843163 + ... + 283909779.

It is an arithmetic number, because the mean of its divisors is an integer number (2364229451682).

Almost surely, 2^{18910998868607} is an apocalyptic number.

18910998868607 is a deficient number, since it is larger than the sum of its proper divisors (2836744849).

18910998868607 is a wasteful number, since it uses less digits than its factorization.

18910998868607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104937.

The product of its (nonzero) digits is 752467968, while the sum is 80.

The spelling of 18910998868607 in words is "eighteen trillion, nine hundred ten billion, nine hundred ninety-eight million, eight hundred sixty-eight thousand, six hundred seven".