21741153 has 24 divisors (see below), whose sum is σ = 34008480. Its totient is φ = 12317760.

The previous prime is 21741151. The next prime is 21741173. The reversal of 21741153 is 35114712.

It is not a de Polignac number, because 21741153 - 2¹ = 21741151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21741151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18693 + ... + 19821.

It is an arithmetic number, because the mean of its divisors is an integer number (1417020).

Almost surely, 2^21741153 is an apocalyptic number.

It is an amenable number.

21741153 is a deficient number, since it is larger than the sum of its proper divisors (12267327).

21741153 is a wasteful number, since it uses less digits than its factorization.

21741153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1270 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 21741153 is about 4662.7409321128. The cubic root of 21741153 is about 279.1006561186.

Adding to 21741153 its reverse (35114712), we get a palindrome (56855865).

The spelling of 21741153 in words is "twenty-one million, seven hundred forty-one thousand, one hundred fifty-three".