18262140 has 72 divisors (see below), whose sum is σ = 55400688. Its totient is φ = 4492800.

The previous prime is 18262133. The next prime is 18262147. The reversal of 18262140 is 4126281.

It is an interprime number because it is at equal distance from previous prime (18262133) and next prime (18262147).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18262140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18262147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9240 + ... + 11040.

It is an arithmetic number, because the mean of its divisors is an integer number (769454).

Almost surely, 2^18262140 is an apocalyptic number.

18262140 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 18262140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27700344).

18262140 is an abundant number, since it is smaller than the sum of its proper divisors (37138548).

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

18262140 is a wasteful number, since it uses less digits than its factorization.

18262140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1824 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18262140 is about 4273.4225159701. The cubic root of 18262140 is about 263.3402373165.

The spelling of 18262140 in words is "eighteen million, two hundred sixty-two thousand, one hundred forty".