20711541 has 8 divisors (see below), whose sum is σ = 27833344. Its totient is φ = 13698720.

The previous prime is 20711533. The next prime is 20711543. The reversal of 20711541 is 14511702.

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 20711541 - 2³ = 20711533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26800 + ... + 27561.

It is an arithmetic number, because the mean of its divisors is an integer number (3479168).

Almost surely, 2^20711541 is an apocalyptic number.

It is an amenable number.

20711541 is a deficient number, since it is larger than the sum of its proper divisors (7121803).

20711541 is a wasteful number, since it uses less digits than its factorization.

20711541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54491.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 20711541 is about 4550.9934080374. The cubic root of 20711541 is about 274.6233565562.

The spelling of 20711541 in words is "twenty million, seven hundred eleven thousand, five hundred forty-one".