21049134 has 8 divisors (see below), whose sum is σ = 42098280. Its totient is φ = 7016376.

The previous prime is 21049121. The next prime is 21049141. The reversal of 21049134 is 43194012.

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

21049134 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1754089 + ... + 1754100.

It is an arithmetic number, because the mean of its divisors is an integer number (5262285).

Almost surely, 2^21049134 is an apocalyptic number.

21049134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21049134 is a wasteful number, since it uses less digits than its factorization.

21049134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508194.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21049134 is about 4587.9335217503. The cubic root of 21049134 is about 276.1074198542.

The spelling of 21049134 in words is "twenty-one million, forty-nine thousand, one hundred thirty-four".