20995260 has 96 divisors (see below), whose sum is σ = 69092352. Its totient is φ = 4696320.

The previous prime is 20995237. The next prime is 20995267. The reversal of 20995260 is 6259902.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20995267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7357 + ... + 9803.

It is an arithmetic number, because the mean of its divisors is an integer number (719712).

Almost surely, 2^20995260 is an apocalyptic number.

20995260 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 20995260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34546176).

20995260 is an abundant number, since it is smaller than the sum of its proper divisors (48097092).

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

20995260 is a wasteful number, since it uses less digits than its factorization.

20995260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2481 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20995260 is about 4582.0584893692. The cubic root of 20995260 is about 275.8716584562.

It can be divided in two parts, 209952 and 60, that added together give a palindrome (210012).

The spelling of 20995260 in words is "twenty million, nine hundred ninety-five thousand, two hundred sixty".