18519214 has 32 divisors (see below), whose sum is σ = 33288192. Its totient is φ = 7560000.

The previous prime is 18519211. The next prime is 18519217. The reversal of 18519214 is 41291581.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18519211) and next prime (18519217).

It is a super-2 number, since 2×18519214² = 685922574355592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18519211) 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, 30514 + ... + 31114.

It is an arithmetic number, because the mean of its divisors is an integer number (1040256).

Almost surely, 2^18519214 is an apocalyptic number.

18519214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18519214 is a deficient number, since it is larger than the sum of its proper divisors (14768978).

18519214 is a wasteful number, since it uses less digits than its factorization.

18519214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712.

The product of its digits is 2880, while the sum is 31.

The square root of 18519214 is about 4303.3956360065. The cubic root of 18519214 is about 264.5701539773.

The spelling of 18519214 in words is "eighteen million, five hundred nineteen thousand, two hundred fourteen".