21854034 has 12 divisors (see below), whose sum is σ = 47350446. Its totient is φ = 7284672.

The previous prime is 21854011. The next prime is 21854051. The reversal of 21854034 is 43045812.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 91809 = 4665^2 + 303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21853989 and 21854007.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 607039 + ... + 607074.

Almost surely, 2^21854034 is an apocalyptic number.

21854034 is an abundant number, since it is smaller than the sum of its proper divisors (25496412).

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

21854034 is a wasteful number, since it uses less digits than its factorization.

21854034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214121 (or 1214118 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 21854034 is about 4674.8298364753. The cubic root of 21854034 is about 279.5828567408.

Adding to 21854034 its reverse (43045812), we get a palindrome (64899846).

The spelling of 21854034 in words is "twenty-one million, eight hundred fifty-four thousand, thirty-four".