20635142 has 16 divisors (see below), whose sum is σ = 33858000. Its totient is φ = 9354240.

The previous prime is 20635103. The next prime is 20635169. The reversal of 20635142 is 24153602.

It is a congruent number.

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, 8834 + ... + 10922.

It is an arithmetic number, because the mean of its divisors is an integer number (2116125).

Almost surely, 2^20635142 is an apocalyptic number.

20635142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20635142 is a deficient number, since it is larger than the sum of its proper divisors (13222858).

20635142 is a wasteful number, since it uses less digits than its factorization.

20635142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551.

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

The square root of 20635142 is about 4542.5919913635. The cubic root of 20635142 is about 274.2852712925.

Adding to 20635142 its reverse (24153602), we get a palindrome (44788744).

The spelling of 20635142 in words is "twenty million, six hundred thirty-five thousand, one hundred forty-two".