20310066 has 48 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 5773824.

The previous prime is 20310049. The next prime is 20310089. The reversal of 20310066 is 66001302.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45010 + ... + 45458.

It is an arithmetic number, because the mean of its divisors is an integer number (1053000).

Almost surely, 2^20310066 is an apocalyptic number.

20310066 is an abundant number, since it is smaller than the sum of its proper divisors (30233934).

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

20310066 is a wasteful number, since it uses less digits than its factorization.

20310066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20310066 is about 4506.6690581848. The cubic root of 20310066 is about 272.8373220724.

Adding to 20310066 its reverse (66001302), we get a palindrome (86311368).

The spelling of 20310066 in words is "twenty million, three hundred ten thousand, sixty-six".