18949266 has 48 divisors (see below), whose sum is σ = 47736000. Its totient is φ = 5320224.

The previous prime is 18949253. The next prime is 18949297. The reversal of 18949266 is 66294981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6160 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (994500).

Almost surely, 2^18949266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23868000).

18949266 is an abundant number, since it is smaller than the sum of its proper divisors (28786734).

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

18949266 is a wasteful number, since it uses less digits than its factorization.

18949266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623 (or 2620 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 18949266 is about 4353.0754645423. The cubic root of 18949266 is about 266.6024466882.

It can be divided in two parts, 189 and 49266, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 18949266 in words is "eighteen million, nine hundred forty-nine thousand, two hundred sixty-six".