18930636869 has 8 divisors (see below), whose sum is σ = 19055348928. Its totient is φ = 18806060320.

The previous prime is 18930636863. The next prime is 18930636899. The reversal of 18930636869 is 96863603981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18930636869 is a prime.

It is a super-2 number, since 2×18930636869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930636863) 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, 254474 + ... + 320340.

It is an arithmetic number, because the mean of its divisors is an integer number (2381918616).

Almost surely, 2^18930636869 is an apocalyptic number.

It is an amenable number.

18930636869 is a deficient number, since it is larger than the sum of its proper divisors (124712059).

18930636869 is a wasteful number, since it uses less digits than its factorization.

18930636869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67755.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 18930636869 in words is "eighteen billion, nine hundred thirty million, six hundred thirty-six thousand, eight hundred sixty-nine".