20534135 has 4 divisors (see below), whose sum is σ = 24640968. Its totient is φ = 16427304.

The previous prime is 20534099. The next prime is 20534141. The reversal of 20534135 is 53143502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20534135 - 2¹² = 20530039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20534135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053409 + ... + 2053418.

It is an arithmetic number, because the mean of its divisors is an integer number (6160242).

Almost surely, 2^20534135 is an apocalyptic number.

20534135 is a deficient number, since it is larger than the sum of its proper divisors (4106833).

20534135 is an equidigital number, since it uses as much as digits as its factorization.

20534135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106832.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20534135 is about 4531.4605813137. The cubic root of 20534135 is about 273.8370059060.

Adding to 20534135 its reverse (53143502), we get a palindrome (73677637).

The spelling of 20534135 in words is "twenty million, five hundred thirty-four thousand, one hundred thirty-five".