18859470 has 64 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 4170240.

The previous prime is 18859469. The next prime is 18859487. The reversal of 18859470 is 7495881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5062 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (834624).

Almost surely, 2^18859470 is an apocalyptic number.

18859470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18859470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26707968).

18859470 is an abundant number, since it is smaller than the sum of its proper divisors (34556466).

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

18859470 is a wasteful number, since it uses less digits than its factorization.

18859470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18859470 is about 4342.7491292959. The cubic root of 18859470 is about 266.1806581749.

The spelling of 18859470 in words is "eighteen million, eight hundred fifty-nine thousand, four hundred seventy".