18834420 has 48 divisors (see below), whose sum is σ = 57532608. Its totient is φ = 4565760.

The previous prime is 18834397. The next prime is 18834433. The reversal of 18834420 is 2443881.

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

It is a congruent number.

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, 13609 + ... + 14928.

It is an arithmetic number, because the mean of its divisors is an integer number (1198596).

Almost surely, 2^18834420 is an apocalyptic number.

18834420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18834420 is an abundant number, since it is smaller than the sum of its proper divisors (38698188).

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

18834420 is a wasteful number, since it uses less digits than its factorization.

18834420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28560 (or 28558 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 18834420 is about 4339.8640531703. The cubic root of 18834420 is about 266.0627548999.

It can be divided in two parts, 18 and 834420, that added together give a palindrome (834438).

The spelling of 18834420 in words is "eighteen million, eight hundred thirty-four thousand, four hundred twenty".