20652100 has 72 divisors (see below), whose sum is σ = 51816128. Its totient is φ = 6998400.

The previous prime is 20652077. The next prime is 20652103. The reversal of 20652100 is 125602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20652103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114010 + ... + 114190.

Almost surely, 2^20652100 is an apocalyptic number.

20652100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20652100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25908064).

20652100 is an abundant number, since it is smaller than the sum of its proper divisors (31164028).

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

20652100 is a wasteful number, since it uses less digits than its factorization.

20652100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20652100 is about 4544.4581635218. The cubic root of 20652100 is about 274.3603867768.

Adding to 20652100 its reverse (125602), we get a palindrome (20777702).

The spelling of 20652100 in words is "twenty million, six hundred fifty-two thousand, one hundred".