20642262 has 8 divisors (see below), whose sum is σ = 41284536. Its totient is φ = 6880752.

The previous prime is 20642257. The next prime is 20642269. The reversal of 20642262 is 26224602.

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

20642262 is an admirable number.

It is a super-2 number, since 2×20642262² = 852205960953288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642269) 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, 1720183 + ... + 1720194.

It is an arithmetic number, because the mean of its divisors is an integer number (5160567).

Almost surely, 2^20642262 is an apocalyptic number.

20642262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20642262 is a wasteful number, since it uses less digits than its factorization.

20642262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440382.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20642262 is about 4543.3756173136. The cubic root of 20642262 is about 274.3168143524.

Adding to 20642262 its reverse (26224602), we get a palindrome (46866864).

The spelling of 20642262 in words is "twenty million, six hundred forty-two thousand, two hundred sixty-two".