18571234921804 has 24 divisors (see below), whose sum is σ = 33578335831040. Its totient is φ = 8981617783824.

The previous prime is 18571234921721. The next prime is 18571234921853. The reversal of 18571234921804 is 40812943217581.

It is a super-2 number, since 2×18571234921804² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524119644 + ... + 524155075.

Almost surely, 2^{18571234921804} is an apocalyptic number.

It is an amenable number.

18571234921804 is a deficient number, since it is larger than the sum of its proper divisors (15007100909236).

18571234921804 is a wasteful number, since it uses less digits than its factorization.

18571234921804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048274869 (or 1048274867 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 18571234921804 in words is "eighteen trillion, five hundred seventy-one billion, two hundred thirty-four million, nine hundred twenty-one thousand, eight hundred four".