20261446 has 8 divisors (see below), whose sum is σ = 30777120. Its totient is φ = 10002408.

The previous prime is 20261431. The next prime is 20261497. The reversal of 20261446 is 64416202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20261446.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63961 + ... + 64276.

It is an arithmetic number, because the mean of its divisors is an integer number (3847140).

Almost surely, 2^20261446 is an apocalyptic number.

20261446 is a deficient number, since it is larger than the sum of its proper divisors (10515674).

20261446 is a wasteful number, since it uses less digits than its factorization.

20261446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128318.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20261446 is about 4501.2715981154. The cubic root of 20261446 is about 272.6194342206.

Adding to 20261446 its reverse (64416202), we get a palindrome (84677648).

The spelling of 20261446 in words is "twenty million, two hundred sixty-one thousand, four hundred forty-six".