18880930 has 32 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 7144896.

The previous prime is 18880909. The next prime is 18880937. The reversal of 18880930 is 3908881.

It is a self number, because there is not a number n which added to its sum of digits gives 18880930.

It is not an unprimeable number, because it can be changed into a prime (18880937) 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, 23292 + ... + 24088.

It is an arithmetic number, because the mean of its divisors is an integer number (1120392).

Almost surely, 2^18880930 is an apocalyptic number.

18880930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18880930 is a deficient number, since it is larger than the sum of its proper divisors (16971614).

18880930 is a wasteful number, since it uses less digits than its factorization.

18880930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18880930 is about 4345.2192119616. The cubic root of 18880930 is about 266.2815813303.

It can be divided in two parts, 188 and 80930, that added together give a palindrome (81118).

The spelling of 18880930 in words is "eighteen million, eight hundred eighty thousand, nine hundred thirty".