20711534 has 8 divisors (see below), whose sum is σ = 32069568. Its totient is φ = 10021680.

The previous prime is 20711533. The next prime is 20711543. The reversal of 20711534 is 43511702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711531) 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 3 ways as a sum of consecutive naturals, for example, 166967 + ... + 167090.

It is an arithmetic number, because the mean of its divisors is an integer number (4008696).

Almost surely, 2^20711534 is an apocalyptic number.

20711534 is a deficient number, since it is larger than the sum of its proper divisors (11358034).

20711534 is a wasteful number, since it uses less digits than its factorization.

20711534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334090.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20711534 is about 4550.9926389745. The cubic root of 20711534 is about 274.6233256176.

The spelling of 20711534 in words is "twenty million, seven hundred eleven thousand, five hundred thirty-four".