20116537 has 8 divisors (see below), whose sum is σ = 23305856. Its totient is φ = 17006112.

The previous prime is 20116531. The next prime is 20116543. The reversal of 20116537 is 73561102.

It is an interprime number because it is at equal distance from previous prime (20116531) and next prime (20116543).

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

It is a 12-Lehmer number, since φ(20116537) divides (20116537-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 20116537 - 2¹⁵ = 20083769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20116531) 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 7 ways as a sum of consecutive naturals, for example, 19173 + ... + 20194.

It is an arithmetic number, because the mean of its divisors is an integer number (2913232).

Almost surely, 2^20116537 is an apocalyptic number.

It is an amenable number.

20116537 is a deficient number, since it is larger than the sum of its proper divisors (3189319).

20116537 is an equidigital number, since it uses as much as digits as its factorization.

20116537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39447.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20116537 is about 4485.1462629439. The cubic root of 20116537 is about 271.9679577667.

Adding to 20116537 its reverse (73561102), we get a palindrome (93677639).

The spelling of 20116537 in words is "twenty million, one hundred sixteen thousand, five hundred thirty-seven".