18451518099974 has 16 divisors (see below), whose sum is σ = 27792086522112. Its totient is φ = 9187513432968.

The previous prime is 18451518099967. The next prime is 18451518099977. The reversal of 18451518099974 is 47999081515481.

It is a junction number, because it is equal to n+sod(n) for n = 18451518099898 and 18451518099907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18451518099977) 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, 4514864 + ... + 7568819.

It is an arithmetic number, because the mean of its divisors is an integer number (1737005407632).

Almost surely, 2^{18451518099974} is an apocalyptic number.

18451518099974 is a deficient number, since it is larger than the sum of its proper divisors (9340568422138).

18451518099974 is a wasteful number, since it uses less digits than its factorization.

18451518099974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12086851.

The product of its (nonzero) digits is 130636800, while the sum is 71.

The spelling of 18451518099974 in words is "eighteen trillion, four hundred fifty-one billion, five hundred eighteen million, ninety-nine thousand, nine hundred seventy-four".