20605260 has 48 divisors (see below), whose sum is σ = 62135136. Its totient is φ = 5071872.

The previous prime is 20605229. The next prime is 20605267. The reversal of 20605260 is 6250602.

It is not an unprimeable number, because it can be changed into a prime (20605267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12429 + ... + 13988.

It is an arithmetic number, because the mean of its divisors is an integer number (1294482).

Almost surely, 2^20605260 is an apocalyptic number.

20605260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20605260 is an abundant number, since it is smaller than the sum of its proper divisors (41529876).

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

20605260 is a wasteful number, since it uses less digits than its factorization.

20605260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26442 (or 26440 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20605260 is about 4539.3017084129. The cubic root of 20605260 is about 274.1528087197.

Adding to 20605260 its reverse (6250602), we get a palindrome (26855862).

The spelling of 20605260 in words is "twenty million, six hundred five thousand, two hundred sixty".