18881672668619 has 8 divisors (see below), whose sum is σ = 18891094289760. Its totient is φ = 18872251570816.

The previous prime is 18881672668589. The next prime is 18881672668631. The reversal of 18881672668619 is 91686627618881.

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 18881672668619 - 2²⁸ = 18881404233163 is a prime.

It is a super-2 number, since 2×18881672668619² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18881672668619.

It is not an unprimeable number, because it can be changed into a prime (18881672668679) 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, 86087297 + ... + 86306349.

It is an arithmetic number, because the mean of its divisors is an integer number (2361386786220).

Almost surely, 2^{18881672668619} is an apocalyptic number.

18881672668619 is a deficient number, since it is larger than the sum of its proper divisors (9421621141).

18881672668619 is a wasteful number, since it uses less digits than its factorization.

18881672668619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261669.

The product of its digits is 668860416, while the sum is 77.

The spelling of 18881672668619 in words is "eighteen trillion, eight hundred eighty-one billion, six hundred seventy-two million, six hundred sixty-eight thousand, six hundred nineteen".