18819243790 has 8 divisors (see below), whose sum is σ = 33874638840. Its totient is φ = 7527697512.

The previous prime is 18819243787. The next prime is 18819243829. The reversal of 18819243790 is 9734291881.

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

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 3 ways as a sum of consecutive naturals, for example, 940962180 + ... + 940962199.

It is an arithmetic number, because the mean of its divisors is an integer number (4234329855).

Almost surely, 2^18819243790 is an apocalyptic number.

18819243790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18819243790 is a deficient number, since it is larger than the sum of its proper divisors (15055395050).

18819243790 is a wasteful number, since it uses less digits than its factorization.

18819243790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881924386.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 18819243790 in words is "eighteen billion, eight hundred nineteen million, two hundred forty-three thousand, seven hundred ninety".