18019471590 has 48 divisors (see below), whose sum is σ = 47734612848. Its totient is φ = 4714527168.

The previous prime is 18019471573. The next prime is 18019471609. The reversal of 18019471590 is 9517491081.

It is a happy number.

18019471590 is a `hidden beast` number, since 1 + 8 + 0 + 19 + 47 + 1 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1884064 + ... + 1893603.

It is an arithmetic number, because the mean of its divisors is an integer number (994471101).

Almost surely, 2^18019471590 is an apocalyptic number.

18019471590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18019471590 is an abundant number, since it is smaller than the sum of its proper divisors (29715141258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18019471590 is a wasteful number, since it uses less digits than its factorization.

18019471590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777733 (or 3777730 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 18019471590 in words is "eighteen billion, nineteen million, four hundred seventy-one thousand, five hundred ninety".