21324753 has 12 divisors (see below), whose sum is σ = 30850560. Its totient is φ = 14194296.

The previous prime is 21324739. The next prime is 21324761. The reversal of 21324753 is 35742312.

It is not a de Polignac number, because 21324753 - 2¹⁴ = 21308369 is a prime.

It is a super-2 number, since 2×21324753² = 909490181022018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21324713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5968 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (2570880).

Almost surely, 2^21324753 is an apocalyptic number.

It is an amenable number.

21324753 is a deficient number, since it is larger than the sum of its proper divisors (9525807).

21324753 is a wasteful number, since it uses less digits than its factorization.

21324753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708 (or 3705 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 21324753 is about 4617.8732117718. The cubic root of 21324753 is about 277.3073218113.

The spelling of 21324753 in words is "twenty-one million, three hundred twenty-four thousand, seven hundred fifty-three".