18229425 has 24 divisors (see below), whose sum is σ = 30489120. Its totient is φ = 9609600.

The previous prime is 18229411. The next prime is 18229439. The reversal of 18229425 is 52492281.

It is an interprime number because it is at equal distance from previous prime (18229411) and next prime (18229439).

It is not a de Polignac number, because 18229425 - 2⁶ = 18229361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5310 + ... + 8040.

It is an arithmetic number, because the mean of its divisors is an integer number (1270380).

Almost surely, 2^18229425 is an apocalyptic number.

18229425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18229425 is a deficient number, since it is larger than the sum of its proper divisors (12259695).

18229425 is a wasteful number, since it uses less digits than its factorization.

18229425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833 (or 2828 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 18229425 is about 4269.5930719449. The cubic root of 18229425 is about 263.1828931165.

The spelling of 18229425 in words is "eighteen million, two hundred twenty-nine thousand, four hundred twenty-five".