21140214 has 16 divisors (see below), whose sum is σ = 44767728. Its totient is φ = 6632192.

The previous prime is 21140213. The next prime is 21140237. The reversal of 21140214 is 41204112.

It is a super-3 number, since 3×21140214³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21140193 and 21140202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103527 + ... + 103730.

It is an arithmetic number, because the mean of its divisors is an integer number (2797983).

Almost surely, 2^21140214 is an apocalyptic number.

21140214 is an abundant number, since it is smaller than the sum of its proper divisors (23627514).

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

21140214 is a wasteful number, since it uses less digits than its factorization.

21140214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207279.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21140214 is about 4597.8488448404. The cubic root of 21140214 is about 276.5050875046.

Adding to 21140214 its reverse (41204112), we get a palindrome (62344326).

The spelling of 21140214 in words is "twenty-one million, one hundred forty thousand, two hundred fourteen".