20268642 has 8 divisors (see below), whose sum is σ = 40537296. Its totient is φ = 6756212.

The previous prime is 20268613. The next prime is 20268643. The reversal of 20268642 is 24686202.

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

20268642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20268643) 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 3 ways as a sum of consecutive naturals, for example, 1689048 + ... + 1689059.

It is an arithmetic number, because the mean of its divisors is an integer number (5067162).

Almost surely, 2^20268642 is an apocalyptic number.

20268642 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.

20268642 is a wasteful number, since it uses less digits than its factorization.

20268642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378112.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20268642 is about 4502.0708568391. The cubic root of 20268642 is about 272.6517046593.

It can be divided in two parts, 20268 and 642, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20268642 in words is "twenty million, two hundred sixty-eight thousand, six hundred forty-two".