18789547490 has 16 divisors (see below), whose sum is σ = 38652783552. Its totient is φ = 6442130544.

The previous prime is 18789547489. The next prime is 18789547493. The reversal of 18789547490 is 9474598781.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18789547493) 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, 134210984 + ... + 134211123.

It is an arithmetic number, because the mean of its divisors is an integer number (2415798972).

Almost surely, 2^18789547490 is an apocalyptic number.

18789547490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18789547490 is an abundant number, since it is smaller than the sum of its proper divisors (19863236062).

18789547490 is a wasteful number, since it uses less digits than its factorization.

18789547490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268422121.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 18789547490 in words is "eighteen billion, seven hundred eighty-nine million, five hundred forty-seven thousand, four hundred ninety".