20442367 has 8 divisors (see below), whose sum is σ = 22418640. Its totient is φ = 18485760.

The previous prime is 20442349. The next prime is 20442397. The reversal of 20442367 is 76324402.

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

It is a cyclic number.

It is not a de Polignac number, because 20442367 - 2¹¹ = 20440319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2692 + ... + 6937.

It is an arithmetic number, because the mean of its divisors is an integer number (2802330).

Almost surely, 2^20442367 is an apocalyptic number.

20442367 is a deficient number, since it is larger than the sum of its proper divisors (1976273).

20442367 is a wasteful number, since it uses less digits than its factorization.

20442367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9833.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20442367 is about 4521.3235893928. The cubic root of 20442367 is about 273.4284666208.

Adding to 20442367 its reverse (76324402), we get a palindrome (96766769).

The spelling of 20442367 in words is "twenty million, four hundred forty-two thousand, three hundred sixty-seven".