21834254 has 16 divisors (see below), whose sum is σ = 35396592. Its totient is φ = 10041408.

The previous prime is 21834233. The next prime is 21834269. The reversal of 21834254 is 45243812.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6797 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (2212287).

Almost surely, 2^21834254 is an apocalyptic number.

21834254 is a deficient number, since it is larger than the sum of its proper divisors (13562338).

21834254 is a wasteful number, since it uses less digits than its factorization.

21834254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its digits is 7680, while the sum is 29.

The square root of 21834254 is about 4672.7137725309. The cubic root of 21834254 is about 279.4984814994.

The spelling of 21834254 in words is "twenty-one million, eight hundred thirty-four thousand, two hundred fifty-four".