20820102 has 8 divisors (see below), whose sum is σ = 41640216. Its totient is φ = 6940032.

The previous prime is 20820101. The next prime is 20820113. The reversal of 20820102 is 20102802.

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

20820102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20820101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735003 + ... + 1735014.

It is an arithmetic number, because the mean of its divisors is an integer number (5205027).

Almost surely, 2^20820102 is an apocalyptic number.

20820102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20820102 is a wasteful number, since it uses less digits than its factorization.

20820102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470022.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20820102 is about 4562.9049957237. The cubic root of 20820102 is about 275.1023398714.

Adding to 20820102 its reverse (20102802), we get a palindrome (40922904).

The spelling of 20820102 in words is "twenty million, eight hundred twenty thousand, one hundred two".