20551260 has 24 divisors (see below), whose sum is σ = 57543696. Its totient is φ = 5480320.

The previous prime is 20551253. The next prime is 20551277. The reversal of 20551260 is 6215502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171201 + ... + 171320.

It is an arithmetic number, because the mean of its divisors is an integer number (2397654).

Almost surely, 2^20551260 is an apocalyptic number.

20551260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20551260 is an abundant number, since it is smaller than the sum of its proper divisors (36992436).

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

20551260 is a wasteful number, since it uses less digits than its factorization.

20551260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342533 (or 342531 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20551260 is about 4533.3497548722. The cubic root of 20551260 is about 273.9131093584.

Adding to 20551260 its reverse (6215502), we get a palindrome (26766762).

The spelling of 20551260 in words is "twenty million, five hundred fifty-one thousand, two hundred sixty".