18949764 has 48 divisors (see below), whose sum is σ = 49291200. Its totient is φ = 5630976.

The previous prime is 18949757. The next prime is 18949771. The reversal of 18949764 is 46794981.

It is an interprime number because it is at equal distance from previous prime (18949757) and next prime (18949771).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1432 + ... + 6320.

It is an arithmetic number, because the mean of its divisors is an integer number (1026900).

Almost surely, 2^18949764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24645600).

18949764 is an abundant number, since it is smaller than the sum of its proper divisors (30341436).

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

18949764 is a wasteful number, since it uses less digits than its factorization.

18949764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932 (or 4930 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 18949764 is about 4353.1326651045. The cubic root of 18949764 is about 266.6047821675.

The spelling of 18949764 in words is "eighteen million, nine hundred forty-nine thousand, seven hundred sixty-four".