18615849742 has 16 divisors (see below), whose sum is σ = 32942333952. Its totient is φ = 7720859160.

The previous prime is 18615849731. The next prime is 18615849821. The reversal of 18615849742 is 24794851681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21446398 + ... + 21447265.

It is an arithmetic number, because the mean of its divisors is an integer number (2058895872).

Almost surely, 2^18615849742 is an apocalyptic number.

18615849742 is a deficient number, since it is larger than the sum of its proper divisors (14326484210).

18615849742 is a wasteful number, since it uses less digits than its factorization.

18615849742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42893703.

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

The spelling of 18615849742 in words is "eighteen billion, six hundred fifteen million, eight hundred forty-nine thousand, seven hundred forty-two".