18697220927369 has 8 divisors (see below), whose sum is σ = 18796011223080. Its totient is φ = 18598686898176.

The previous prime is 18697220927309. The next prime is 18697220927423. The reversal of 18697220927369 is 96372902279681.

It can be written as a sum of positive squares in 4 ways, for example, as 763803769 + 18696457123600 = 27637^2 + 4323940^2 .

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 18697220927369 - 2³² = 18692925960073 is a prime.

It is a super-2 number, since 2×18697220927369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18697220927309) 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, 63920324 + ... + 64212165.

It is an arithmetic number, because the mean of its divisors is an integer number (2349501402885).

Almost surely, 2^{18697220927369} is an apocalyptic number.

It is an amenable number.

18697220927369 is a deficient number, since it is larger than the sum of its proper divisors (98790295711).

18697220927369 is a wasteful number, since it uses less digits than its factorization.

18697220927369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128133259.

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 18697220927369 in words is "eighteen trillion, six hundred ninety-seven billion, two hundred twenty million, nine hundred twenty-seven thousand, three hundred sixty-nine".