18430572 has 24 divisors (see below), whose sum is σ = 43114176. Its totient is φ = 6127888.

The previous prime is 18430571. The next prime is 18430583. The reversal of 18430572 is 27503481.

It is not an unprimeable number, because it can be changed into a prime (18430571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3583 + ... + 7049.

It is an arithmetic number, because the mean of its divisors is an integer number (1796424).

Almost surely, 2^18430572 is an apocalyptic number.

18430572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18430572 is an abundant number, since it is smaller than the sum of its proper divisors (24683604).

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

18430572 is a wasteful number, since it uses less digits than its factorization.

18430572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917 (or 3915 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 18430572 is about 4293.0842060225. The cubic root of 18430572 is about 264.1473580454.

The spelling of 18430572 in words is "eighteen million, four hundred thirty thousand, five hundred seventy-two".