20542267 has 8 divisors (see below), whose sum is σ = 20947536. Its totient is φ = 20140032.

The previous prime is 20542259. The next prime is 20542283. The reversal of 20542267 is 76224502.

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 20542267 - 2³ = 20542259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20542967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16623 + ... + 17815.

It is an arithmetic number, because the mean of its divisors is an integer number (2618442).

Almost surely, 2^20542267 is an apocalyptic number.

20542267 is a deficient number, since it is larger than the sum of its proper divisors (405269).

20542267 is a wasteful number, since it uses less digits than its factorization.

20542267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20542267 is about 4532.3577749335. The cubic root of 20542267 is about 273.8731497649.

Adding to 20542267 its reverse (76224502), we get a palindrome (96766769).

The spelling of 20542267 in words is "twenty million, five hundred forty-two thousand, two hundred sixty-seven".