20016534 has 8 divisors (see below), whose sum is σ = 40033080. Its totient is φ = 6672176.

The previous prime is 20016523. The next prime is 20016539. The reversal of 20016534 is 43561002.

It is a happy number.

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

20016534 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20016534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668039 + ... + 1668050.

It is an arithmetic number, because the mean of its divisors is an integer number (5004135).

Almost surely, 2^20016534 is an apocalyptic number.

20016534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20016534 is a wasteful number, since it uses less digits than its factorization.

20016534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336094.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20016534 is about 4473.9841305038. The cubic root of 20016534 is about 271.5165413579.

Adding to 20016534 its reverse (43561002), we get a palindrome (63577536).

The spelling of 20016534 in words is "twenty million, sixteen thousand, five hundred thirty-four".