21041849 has 8 divisors (see below), whose sum is σ = 22714560. Its totient is φ = 19432336.

The previous prime is 21041827. The next prime is 21041857. The reversal of 21041849 is 94814012.

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

It is a cyclic number.

It is not a de Polignac number, because 21041849 - 2²⁰ = 19993273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041879) 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, 15107 + ... + 16440.

It is an arithmetic number, because the mean of its divisors is an integer number (2839320).

Almost surely, 2^21041849 is an apocalyptic number.

21041849 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

21041849 is a deficient number, since it is larger than the sum of its proper divisors (1672711).

21041849 is a wasteful number, since it uses less digits than its factorization.

21041849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31599.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 21041849 is about 4587.1395226219. The cubic root of 21041849 is about 276.0755630464.

The spelling of 21041849 in words is "twenty-one million, forty-one thousand, eight hundred forty-nine".