18994519742 has 48 divisors (see below), whose sum is σ = 31572072000. Its totient is φ = 8564001600.

The previous prime is 18994519721. The next prime is 18994519751. The reversal of 18994519742 is 24791549981.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 20184992 + ... + 20185932.

It is an arithmetic number, because the mean of its divisors is an integer number (657751500).

Almost surely, 2^18994519742 is an apocalyptic number.

18994519742 is a deficient number, since it is larger than the sum of its proper divisors (12577552258).

18994519742 is a wasteful number, since it uses less digits than its factorization.

18994519742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1542 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 59.

The spelling of 18994519742 in words is "eighteen billion, nine hundred ninety-four million, five hundred nineteen thousand, seven hundred forty-two".