18970 has 16 divisors (see below), whose sum is σ = 39168. Its totient is φ = 6480.

The previous prime is 18959. The next prime is 18973. The reversal of 18970 is 7981.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18973) 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, 66 + ... + 205.

It is an arithmetic number, because the mean of its divisors is an integer number (2448).

2¹⁸⁹⁷⁰ is an apocalyptic number.

18970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18970 is an abundant number, since it is smaller than the sum of its proper divisors (20198).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19584).

18970 is a wasteful number, since it uses less digits than its factorization.

18970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 18970 is about 137.7316230936. The cubic root of 18970 is about 26.6699648698.

The spelling of 18970 in words is "eighteen thousand, nine hundred seventy".