20924243 has 4 divisors (see below), whose sum is σ = 20956008. Its totient is φ = 20892480.

The previous prime is 20924231. The next prime is 20924249. The reversal of 20924243 is 34242902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20924243 - 2¹⁶ = 20858707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20924249) 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, 14873 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (5239002).

Almost surely, 2^20924243 is an apocalyptic number.

20924243 is a deficient number, since it is larger than the sum of its proper divisors (31765).

20924243 is an equidigital number, since it uses as much as digits as its factorization.

20924243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31764.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20924243 is about 4574.3024604851. The cubic root of 20924243 is about 275.5602594572.

The spelling of 20924243 in words is "twenty million, nine hundred twenty-four thousand, two hundred forty-three".