20305662 has 16 divisors (see below), whose sum is σ = 43735440. Its totient is φ = 6247872.

The previous prime is 20305657. The next prime is 20305669. The reversal of 20305662 is 26650302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130087 + ... + 130242.

It is an arithmetic number, because the mean of its divisors is an integer number (2733465).

Almost surely, 2^20305662 is an apocalyptic number.

20305662 is an abundant number, since it is smaller than the sum of its proper divisors (23429778).

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

20305662 is a wasteful number, since it uses less digits than its factorization.

20305662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260347.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20305662 is about 4506.1804224864. The cubic root of 20305662 is about 272.8176001206.

Adding to 20305662 its reverse (26650302), we get a palindrome (46955964).

The spelling of 20305662 in words is "twenty million, three hundred five thousand, six hundred sixty-two".