20454321 has 4 divisors (see below), whose sum is σ = 27272432. Its totient is φ = 13636212.

The previous prime is 20454311. The next prime is 20454331. The reversal of 20454321 is 12345402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20454311) and next prime (20454331).

It is not a de Polignac number, because 20454321 - 2⁶ = 20454257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20454311) 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, 3409051 + ... + 3409056.

It is an arithmetic number, because the mean of its divisors is an integer number (6818108).

Almost surely, 2^20454321 is an apocalyptic number.

It is an amenable number.

20454321 is a deficient number, since it is larger than the sum of its proper divisors (6818111).

20454321 is an equidigital number, since it uses as much as digits as its factorization.

20454321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818110.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20454321 is about 4522.6453542147. The cubic root of 20454321 is about 273.4817534536.

Adding to 20454321 its reverse (12345402), we get a palindrome (32799723).

The spelling of 20454321 in words is "twenty million, four hundred fifty-four thousand, three hundred twenty-one".