20102306 has 16 divisors (see below), whose sum is σ = 35027520. Its totient is φ = 8473680.

The previous prime is 20102293. The next prime is 20102309. The reversal of 20102306 is 60320102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (20102309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10916 + ... + 12623.

It is an arithmetic number, because the mean of its divisors is an integer number (2189220).

Almost surely, 2^20102306 is an apocalyptic number.

20102306 is a deficient number, since it is larger than the sum of its proper divisors (14925214).

20102306 is a wasteful number, since it uses less digits than its factorization.

20102306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23609.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20102306 is about 4483.5595234144. The cubic root of 20102306 is about 271.9038100618.

Adding to 20102306 its reverse (60320102), we get a palindrome (80422408).

The spelling of 20102306 in words is "twenty million, one hundred two thousand, three hundred six".