20260646 has 8 divisors (see below), whose sum is σ = 34732560. Its totient is φ = 8683128.

The previous prime is 20260637. The next prime is 20260649. The reversal of 20260646 is 64606202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20260649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723581 + ... + 723608.

It is an arithmetic number, because the mean of its divisors is an integer number (4341570).

Almost surely, 2^20260646 is an apocalyptic number.

20260646 is a deficient number, since it is larger than the sum of its proper divisors (14471914).

20260646 is a wasteful number, since it uses less digits than its factorization.

20260646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447198.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20260646 is about 4501.1827334602. The cubic root of 20260646 is about 272.6158461513.

Adding to 20260646 its reverse (64606202), we get a palindrome (84866848).

The spelling of 20260646 in words is "twenty million, two hundred sixty thousand, six hundred forty-six".