18955956 has 48 divisors (see below), whose sum is σ = 46537344. Its totient is φ = 5993856.

The previous prime is 18955943. The next prime is 18955957. The reversal of 18955956 is 65955981.

It is a happy number.

Its product of digits (486000) is a multiple of the sum of its prime factors (600).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47550 + ... + 47946.

It is an arithmetic number, because the mean of its divisors is an integer number (969528).

Almost surely, 2^18955956 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 18955956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23268672).

18955956 is an abundant number, since it is smaller than the sum of its proper divisors (27581388).

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

18955956 is a wasteful number, since it uses less digits than its factorization.

18955956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 598 counting only the distinct ones).

The product of its digits is 486000, while the sum is 48.

The square root of 18955956 is about 4353.8438189719. The cubic root of 18955956 is about 266.6338174814.

The spelling of 18955956 in words is "eighteen million, nine hundred fifty-five thousand, nine hundred fifty-six".