18514428 has 48 divisors (see below), whose sum is σ = 46738944. Its totient is φ = 5681920.

The previous prime is 18514427. The next prime is 18514429. The reversal of 18514428 is 82441581.

It is an interprime number because it is at equal distance from previous prime (18514427) and next prime (18514429).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18514423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8623 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (973728).

Almost surely, 2^18514428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18514428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23369472).

18514428 is an abundant number, since it is smaller than the sum of its proper divisors (28224516).

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

18514428 is a wasteful number, since it uses less digits than its factorization.

18514428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002 (or 2000 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 18514428 is about 4302.8395275678. The cubic root of 18514428 is about 264.5473606800.

The spelling of 18514428 in words is "eighteen million, five hundred fourteen thousand, four hundred twenty-eight".