20321346 has 8 divisors (see below), whose sum is σ = 40642704. Its totient is φ = 6773780.

The previous prime is 20321339. The next prime is 20321359. The reversal of 20321346 is 64312302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20321346 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693440 + ... + 1693451.

It is an arithmetic number, because the mean of its divisors is an integer number (5080338).

Almost surely, 2^20321346 is an apocalyptic number.

20321346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321346 is a wasteful number, since it uses less digits than its factorization.

20321346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386896.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20321346 is about 4507.9203630943. The cubic root of 20321346 is about 272.8878230639.

Adding to 20321346 its reverse (64312302), we get a palindrome (84633648).

The spelling of 20321346 in words is "twenty million, three hundred twenty-one thousand, three hundred forty-six".