20373321 has 4 divisors (see below), whose sum is σ = 27164432. Its totient is φ = 13582212.

The previous prime is 20373317. The next prime is 20373323. The reversal of 20373321 is 12337302.

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 not a de Polignac number, because 20373321 - 2² = 20373317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20373323) 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, 3395551 + ... + 3395556.

It is an arithmetic number, because the mean of its divisors is an integer number (6791108).

Almost surely, 2^20373321 is an apocalyptic number.

It is an amenable number.

20373321 is a deficient number, since it is larger than the sum of its proper divisors (6791111).

20373321 is an equidigital number, since it uses as much as digits as its factorization.

20373321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791110.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20373321 is about 4513.6815350665. The cubic root of 20373321 is about 273.1202760015.

The spelling of 20373321 in words is "twenty million, three hundred seventy-three thousand, three hundred twenty-one".