20466321 has 16 divisors (see below), whose sum is σ = 28111104. Its totient is φ = 13238784.

The previous prime is 20466319. The next prime is 20466331. The reversal of 20466321 is 12366402.

It is not a de Polignac number, because 20466321 - 2¹ = 20466319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20466291 and 20466300.

It is not an unprimeable number, because it can be changed into a prime (20466301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14760 + ... + 16086.

It is an arithmetic number, because the mean of its divisors is an integer number (1756944).

Almost surely, 2^20466321 is an apocalyptic number.

It is an amenable number.

20466321 is a deficient number, since it is larger than the sum of its proper divisors (7644783).

20466321 is a wasteful number, since it uses less digits than its factorization.

20466321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20466321 is about 4523.9718168883. The cubic root of 20466321 is about 273.5352244614.

The spelling of 20466321 in words is "twenty million, four hundred sixty-six thousand, three hundred twenty-one".