20604260 has 12 divisors (see below), whose sum is σ = 43268988. Its totient is φ = 8241696.

The previous prime is 20604247. The next prime is 20604277. The reversal of 20604260 is 6240602.

It can be written as a sum of positive squares in 2 ways, for example, as 7873636 + 12730624 = 2806^2 + 3568^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1030213 = 20604260 / (2 + 0 + 6 + 0 + 4 + 2 + 6 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515087 + ... + 515126.

It is an arithmetic number, because the mean of its divisors is an integer number (3605749).

Almost surely, 2^20604260 is an apocalyptic number.

20604260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20604260 is an abundant number, since it is smaller than the sum of its proper divisors (22664728).

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

20604260 is a wasteful number, since it uses less digits than its factorization.

20604260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030222 (or 1030220 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20604260 is about 4539.1915579759. The cubic root of 20604260 is about 274.1483736508.

Adding to 20604260 its reverse (6240602), we get a palindrome (26844862).

The spelling of 20604260 in words is "twenty million, six hundred four thousand, two hundred sixty".