18276420 has 48 divisors (see below), whose sum is σ = 52270848. Its totient is φ = 4769280.

The previous prime is 18276407. The next prime is 18276431. The reversal of 18276420 is 2467281.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421 + ... + 6060.

It is an arithmetic number, because the mean of its divisors is an integer number (1088976).

Almost surely, 2^18276420 is an apocalyptic number.

18276420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18276420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26135424).

18276420 is an abundant number, since it is smaller than the sum of its proper divisors (33994428).

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

18276420 is a wasteful number, since it uses less digits than its factorization.

18276420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540 (or 6538 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 18276420 is about 4275.0929814450. The cubic root of 18276420 is about 263.4088586801.

The spelling of 18276420 in words is "eighteen million, two hundred seventy-six thousand, four hundred twenty".