20260642 has 16 divisors (see below), whose sum is σ = 31306464. Its totient is φ = 9828000.

The previous prime is 20260637. The next prime is 20260649. The reversal of 20260642 is 24606202.

It is a happy number.

It is a super-2 number, since 2×20260642² = 820987228504328, which contains 22 as substring.

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

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 7 ways as a sum of consecutive naturals, for example, 16717 + ... + 17887.

It is an arithmetic number, because the mean of its divisors is an integer number (1956654).

Almost surely, 2^20260642 is an apocalyptic number.

20260642 is a deficient number, since it is larger than the sum of its proper divisors (11045822).

20260642 is a wasteful number, since it uses less digits than its factorization.

20260642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20260642 is about 4501.1822891325. The cubic root of 20260642 is about 272.6158282107.

Adding to 20260642 its reverse (24606202), we get a palindrome (44866844).

It can be divided in two parts, 20260 and 642, that added together give a palindrome (20902).

The spelling of 20260642 in words is "twenty million, two hundred sixty thousand, six hundred forty-two".