20748135 has 8 divisors (see below), whose sum is σ = 33197040. Its totient is φ = 11065664.

The previous prime is 20748121. The next prime is 20748151. The reversal of 20748135 is 53184702.

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 20748135 - 2⁶ = 20748071 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, 691590 + ... + 691619.

It is an arithmetic number, because the mean of its divisors is an integer number (4149630).

Almost surely, 2^20748135 is an apocalyptic number.

20748135 is a deficient number, since it is larger than the sum of its proper divisors (12448905).

20748135 is a wasteful number, since it uses less digits than its factorization.

20748135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383217.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20748135 is about 4555.0120746272. The cubic root of 20748135 is about 274.7849999970.

The spelling of 20748135 in words is "twenty million, seven hundred forty-eight thousand, one hundred thirty-five".