18864530 has 32 divisors (see below), whose sum is σ = 36590400. Its totient is φ = 6979392.

The previous prime is 18864493. The next prime is 18864533. The reversal of 18864530 is 3546881.

It is not an unprimeable number, because it can be changed into a prime (18864533) 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, 7016 + ... + 9324.

It is an arithmetic number, because the mean of its divisors is an integer number (1143450).

Almost surely, 2^18864530 is an apocalyptic number.

18864530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18864530 is a deficient number, since it is larger than the sum of its proper divisors (17725870).

18864530 is a wasteful number, since it uses less digits than its factorization.

18864530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 18864530 is about 4343.3316705036. The cubic root of 18864530 is about 266.2044614895.

The spelling of 18864530 in words is "eighteen million, eight hundred sixty-four thousand, five hundred thirty".