20534689 has 8 divisors (see below), whose sum is σ = 23588928. Its totient is φ = 17510640.

The previous prime is 20534677. The next prime is 20534711. The reversal of 20534689 is 98643502.

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

It is not a de Polignac number, because 20534689 - 2¹¹ = 20532641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20534669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6067 + ... + 8824.

It is an arithmetic number, because the mean of its divisors is an integer number (2948616).

Almost surely, 2^20534689 is an apocalyptic number.

It is an amenable number.

20534689 is a deficient number, since it is larger than the sum of its proper divisors (3054239).

20534689 is a wasteful number, since it uses less digits than its factorization.

20534689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15095.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20534689 is about 4531.5217090951. The cubic root of 20534689 is about 273.8394685426.

The spelling of 20534689 in words is "twenty million, five hundred thirty-four thousand, six hundred eighty-nine".