18819544142 has 64 divisors (see below), whose sum is σ = 34041047040. Its totient is φ = 7633180800.

The previous prime is 18819544141. The next prime is 18819544147. The reversal of 18819544142 is 24144591881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819544141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5215703 + ... + 5219309.

It is an arithmetic number, because the mean of its divisors is an integer number (531891360).

Almost surely, 2^18819544142 is an apocalyptic number.

18819544142 is a deficient number, since it is larger than the sum of its proper divisors (15221502898).

18819544142 is a wasteful number, since it uses less digits than its factorization.

18819544142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897.

The product of its digits is 368640, while the sum is 47.

The spelling of 18819544142 in words is "eighteen billion, eight hundred nineteen million, five hundred forty-four thousand, one hundred forty-two".