20309102 has 8 divisors (see below), whose sum is σ = 33233112. Its totient is φ = 9231400.

The previous prime is 20309087. The next prime is 20309129. The reversal of 20309102 is 20190302.

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

It is a congruent 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, 461549 + ... + 461592.

It is an arithmetic number, because the mean of its divisors is an integer number (4154139).

Almost surely, 2^20309102 is an apocalyptic number.

20309102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20309102 is a deficient number, since it is larger than the sum of its proper divisors (12924010).

20309102 is a wasteful number, since it uses less digits than its factorization.

20309102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923154.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20309102 is about 4506.5621043097. The cubic root of 20309102 is about 272.8330053403.

Adding to 20309102 its reverse (20190302), we get a palindrome (40499404).

The spelling of 20309102 in words is "twenty million, three hundred nine thousand, one hundred two".