18765340 has 24 divisors (see below), whose sum is σ = 42990192. Its totient is φ = 6823680.

The previous prime is 18765337. The next prime is 18765343. The reversal of 18765340 is 4356781.

It is an interprime number because it is at equal distance from previous prime (18765337) and next prime (18765343).

It is a junction number, because it is equal to n+sod(n) for n = 18765296 and 18765305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18765343) 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, 42429 + ... + 42868.

It is an arithmetic number, because the mean of its divisors is an integer number (1791258).

Almost surely, 2^18765340 is an apocalyptic number.

18765340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18765340 is an abundant number, since it is smaller than the sum of its proper divisors (24224852).

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

18765340 is a wasteful number, since it uses less digits than its factorization.

18765340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85317 (or 85315 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 18765340 is about 4331.8979674041. The cubic root of 18765340 is about 265.7370722466.

The spelling of 18765340 in words is "eighteen million, seven hundred sixty-five thousand, three hundred forty".