18542003421804 has 48 divisors (see below), whose sum is σ = 43788385589760. Its totient is φ = 6105860292160.

The previous prime is 18542003421787. The next prime is 18542003421817. The reversal of 18542003421804 is 40812430024581.

It is a super-2 number, since 2×18542003421804² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17606542 + ... + 18629930.

It is an arithmetic number, because the mean of its divisors is an integer number (912258033120).

Almost surely, 2^{18542003421804} is an apocalyptic number.

It is an amenable number.

18542003421804 is an abundant number, since it is smaller than the sum of its proper divisors (25246382167956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18542003421804 is a wasteful number, since it uses less digits than its factorization.

18542003421804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041670 (or 1041668 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The spelling of 18542003421804 in words is "eighteen trillion, five hundred forty-two billion, three million, four hundred twenty-one thousand, eight hundred four".