20634135 has 8 divisors (see below), whose sum is σ = 33014640. Its totient is φ = 11004864.

The previous prime is 20634101. The next prime is 20634143. The reversal of 20634135 is 53143602.

It is a happy number.

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

It is not a de Polignac number, because 20634135 - 2⁹ = 20633623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687790 + ... + 687819.

It is an arithmetic number, because the mean of its divisors is an integer number (4126830).

Almost surely, 2^20634135 is an apocalyptic number.

20634135 is a deficient number, since it is larger than the sum of its proper divisors (12380505).

20634135 is a wasteful number, since it uses less digits than its factorization.

20634135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375617.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20634135 is about 4542.4811502086. The cubic root of 20634135 is about 274.2808094904.

Adding to 20634135 its reverse (53143602), we get a palindrome (73777737).

The spelling of 20634135 in words is "twenty million, six hundred thirty-four thousand, one hundred thirty-five".