20142635 has 8 divisors (see below), whose sum is σ = 24222240. Its totient is φ = 16080064.

The previous prime is 20142613. The next prime is 20142673. The reversal of 20142635 is 53624102.

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 20142635 - 2¹⁴ = 20126251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20142635.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (3027780).

Almost surely, 2^20142635 is an apocalyptic number.

20142635 is a deficient number, since it is larger than the sum of its proper divisors (4079605).

20142635 is an equidigital number, since it uses as much as digits as its factorization.

20142635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20142635 is about 4488.0547010927. The cubic root of 20142635 is about 272.0855186329.

Adding to 20142635 its reverse (53624102), we get a palindrome (73766737).

The spelling of 20142635 in words is "twenty million, one hundred forty-two thousand, six hundred thirty-five".