21054214 has 16 divisors (see below), whose sum is σ = 32744448. Its totient is φ = 10146312.

The previous prime is 21054199. The next prime is 21054233. The reversal of 21054214 is 41245012.

It is a junction number, because it is equal to n+sod(n) for n = 21054191 and 21054200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4627 + ... + 7969.

It is an arithmetic number, because the mean of its divisors is an integer number (2046528).

Almost surely, 2^21054214 is an apocalyptic number.

21054214 is a deficient number, since it is larger than the sum of its proper divisors (11690234).

21054214 is a wasteful number, since it uses less digits than its factorization.

21054214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21054214 is about 4588.4871145074. The cubic root of 21054214 is about 276.1296299979.

Adding to 21054214 its reverse (41245012), we get a palindrome (62299226).

The spelling of 21054214 in words is "twenty-one million, fifty-four thousand, two hundred fourteen".