18947010 has 64 divisors (see below), whose sum is σ = 48771072. Its totient is φ = 4694016.

The previous prime is 18946999. The next prime is 18947017. The reversal of 18947010 is 1074981.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18947017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49279 + ... + 49661.

It is an arithmetic number, because the mean of its divisors is an integer number (762048).

Almost surely, 2^18947010 is an apocalyptic number.

18947010 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 18947010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24385536).

18947010 is an abundant number, since it is smaller than the sum of its proper divisors (29824062).

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

18947010 is a wasteful number, since it uses less digits than its factorization.

18947010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 18947010 is about 4352.8163296882. The cubic root of 18947010 is about 266.5918661731.

The spelling of 18947010 in words is "eighteen million, nine hundred forty-seven thousand, ten".