16218954 has 40 divisors (see below), whose sum is σ = 37047780. Its totient is φ = 5301504.

The previous prime is 16218949. The next prime is 16218967. The reversal of 16218954 is 45981261.

It can be written as a sum of positive squares in 2 ways, for example, as 16040025 + 178929 = 4005^2 + 423^2 .

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7642 + ... + 9530.

Almost surely, 2^16218954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16218954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18523890).

16218954 is an abundant number, since it is smaller than the sum of its proper divisors (20828826).

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

16218954 is a wasteful number, since it uses less digits than its factorization.

16218954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956 (or 1947 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 16218954 is about 4027.2762507680. The cubic root of 16218954 is about 253.1284427515.

The spelling of 16218954 in words is "sixteen million, two hundred eighteen thousand, nine hundred fifty-four".