18474427890 has 64 divisors (see below), whose sum is σ = 51858057600. Its totient is φ = 4667222592.

The previous prime is 18474427861. The next prime is 18474427903. The reversal of 18474427890 is 9872447481.

18474427890 is a `hidden beast` number, since 1 + 8 + 47 + 442 + 78 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1795497 + ... + 1805756.

It is an arithmetic number, because the mean of its divisors is an integer number (810282150).

Almost surely, 2^18474427890 is an apocalyptic number.

18474427890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18474427890 is an abundant number, since it is smaller than the sum of its proper divisors (33383629710).

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

18474427890 is a wasteful number, since it uses less digits than its factorization.

18474427890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601288 (or 3601282 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 18474427890 in words is "eighteen billion, four hundred seventy-four million, four hundred twenty-seven thousand, eight hundred ninety".