20321064 has 32 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 6773616.

The previous prime is 20321057. The next prime is 20321071. The reversal of 20321064 is 46012302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20321057) and next prime (20321071).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46824 + ... + 47255.

It is an arithmetic number, because the mean of its divisors is an integer number (1764000).

Almost surely, 2^20321064 is an apocalyptic number.

20321064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20321064 is an abundant number, since it is smaller than the sum of its proper divisors (36126936).

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

20321064 is a wasteful number, since it uses less digits than its factorization.

20321064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94094 (or 94084 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20321064 is about 4507.8890847047. The cubic root of 20321064 is about 272.8865607669.

Adding to 20321064 its reverse (46012302), we get a palindrome (66333366).

The spelling of 20321064 in words is "twenty million, three hundred twenty-one thousand, sixty-four".