21434174 has 16 divisors (see below), whose sum is σ = 33241488. Its totient is φ = 10357632.

The previous prime is 21434173. The next prime is 21434177. The reversal of 21434174 is 47143412.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434173) 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, 11174 + ... + 12950.

It is an arithmetic number, because the mean of its divisors is an integer number (2077593).

Almost surely, 2^21434174 is an apocalyptic number.

21434174 is a deficient number, since it is larger than the sum of its proper divisors (11807314).

21434174 is a wasteful number, since it uses less digits than its factorization.

21434174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its digits is 2688, while the sum is 26.

The square root of 21434174 is about 4629.7056061914. The cubic root of 21434174 is about 277.7808168319.

Adding to 21434174 its reverse (47143412), we get a palindrome (68577586).

The spelling of 21434174 in words is "twenty-one million, four hundred thirty-four thousand, one hundred seventy-four".