18916030 has 16 divisors (see below), whose sum is σ = 38913120. Its totient is φ = 6485472.

The previous prime is 18915989. The next prime is 18916031. The reversal of 18916030 is 3061981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18916030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18916031) 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 7 ways as a sum of consecutive naturals, for example, 135045 + ... + 135184.

It is an arithmetic number, because the mean of its divisors is an integer number (2432070).

Almost surely, 2^18916030 is an apocalyptic number.

18916030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18916030 is an abundant number, since it is smaller than the sum of its proper divisors (19997090).

18916030 is a wasteful number, since it uses less digits than its factorization.

18916030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270243.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 18916030 is about 4349.2562582584. The cubic root of 18916030 is about 266.4464866557.

It can be divided in two parts, 1891 and 6030, that added together give a square (7921 = 89²).

The spelling of 18916030 in words is "eighteen million, nine hundred sixteen thousand, thirty".