18933948 has 72 divisors (see below), whose sum is σ = 52743600. Its totient is φ = 5679360.

The previous prime is 18933947. The next prime is 18933977. The reversal of 18933948 is 84933981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18933947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54078 + ... + 54426.

It is an arithmetic number, because the mean of its divisors is an integer number (732550).

Almost surely, 2^18933948 is an apocalyptic number.

18933948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18933948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26371800).

18933948 is an abundant number, since it is smaller than the sum of its proper divisors (33809652).

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

18933948 is a wasteful number, since it uses less digits than its factorization.

18933948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 502 counting only the distinct ones).

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

The square root of 18933948 is about 4351.3156631070. The cubic root of 18933948 is about 266.5305896010.

It can be divided in two parts, 18933 and 948, that added together give a square (19881 = 141²).

The spelling of 18933948 in words is "eighteen million, nine hundred thirty-three thousand, nine hundred forty-eight".