18542261972518 has 8 divisors (see below), whose sum is σ = 27813418530048. Its totient is φ = 9271122462504.

The previous prime is 18542261972461. The next prime is 18542261972543. The reversal of 18542261972518 is 81527916224581.

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

It is a super-2 number, since 2×18542261972518² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062246 + ... + 6181657.

It is an arithmetic number, because the mean of its divisors is an integer number (3476677316256).

Almost surely, 2^{18542261972518} is an apocalyptic number.

18542261972518 is a deficient number, since it is larger than the sum of its proper divisors (9271156557530).

18542261972518 is a wasteful number, since it uses less digits than its factorization.

18542261972518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523758.

The product of its digits is 19353600, while the sum is 61.

The spelling of 18542261972518 in words is "eighteen trillion, five hundred forty-two billion, two hundred sixty-one million, nine hundred seventy-two thousand, five hundred eighteen".