18945756932087 has 8 divisors (see below), whose sum is σ = 19871800257216. Its totient is φ = 18041502861792.

The previous prime is 18945756931999. The next prime is 18945756932111. The reversal of 18945756932087 is 78023965754981.

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 18945756932087 - 2⁸ = 18945756931831 is a prime.

It is a super-2 number, since 2×18945756932087² (a number of 27 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 (18945756932287) 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, 5447311928 + ... + 5447315405.

It is an arithmetic number, because the mean of its divisors is an integer number (2483975032152).

It is a 1-persistent number, because it is pandigital, but 2⋅18945756932087 = 37891513864174 is not.

Almost surely, 2^{18945756932087} is an apocalyptic number.

18945756932087 is a deficient number, since it is larger than the sum of its proper divisors (926043325129).

18945756932087 is a wasteful number, since it uses less digits than its factorization.

18945756932087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10894627417.

The product of its (nonzero) digits is 914457600, while the sum is 74.

The spelling of 18945756932087 in words is "eighteen trillion, nine hundred forty-five billion, seven hundred fifty-six million, nine hundred thirty-two thousand, eighty-seven".