18874420 has 48 divisors (see below), whose sum is σ = 42977088. Its totient is φ = 6935040.

The previous prime is 18874417. The next prime is 18874423. The reversal of 18874420 is 2447881.

It is an interprime number because it is at equal distance from previous prime (18874417) and next prime (18874423).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13975 + ... + 15265.

It is an arithmetic number, because the mean of its divisors is an integer number (895356).

Almost surely, 2^18874420 is an apocalyptic number.

18874420 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 18874420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21488544).

18874420 is an abundant number, since it is smaller than the sum of its proper divisors (24102668).

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

18874420 is a wasteful number, since it uses less digits than its factorization.

18874420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 18874420 is about 4344.4700482337. The cubic root of 18874420 is about 266.2509738626.

The spelling of 18874420 in words is "eighteen million, eight hundred seventy-four thousand, four hundred twenty".