18740430 has 64 divisors (see below), whose sum is σ = 51609600. Its totient is φ = 4834080.

The previous prime is 18740411. The next prime is 18740431. The reversal of 18740430 is 3404781.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18740394 and 18740403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7251 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (806400).

Almost surely, 2^18740430 is an apocalyptic number.

18740430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18740430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25804800).

18740430 is an abundant number, since it is smaller than the sum of its proper divisors (32869170).

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

18740430 is a wasteful number, since it uses less digits than its factorization.

18740430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18740430 is about 4329.0218294668. The cubic root of 18740430 is about 265.6194361926.

The spelling of 18740430 in words is "eighteen million, seven hundred forty thousand, four hundred thirty".