21849134 has 8 divisors (see below), whose sum is σ = 32793600. Its totient is φ = 10917936.

The previous prime is 21849127. The next prime is 21849137. The reversal of 21849134 is 43194812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21849134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21849137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4307 + ... + 7889.

It is an arithmetic number, because the mean of its divisors is an integer number (4099200).

Almost surely, 2^21849134 is an apocalyptic number.

21849134 is a deficient number, since it is larger than the sum of its proper divisors (10944466).

21849134 is a wasteful number, since it uses less digits than its factorization.

21849134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6634.

The product of its digits is 6912, while the sum is 32.

The square root of 21849134 is about 4674.3057238482. The cubic root of 21849134 is about 279.5619596317.

The spelling of 21849134 in words is "twenty-one million, eight hundred forty-nine thousand, one hundred thirty-four".