20537545 has 8 divisors (see below), whose sum is σ = 28165824. Its totient is φ = 14082864.

The previous prime is 20537521. The next prime is 20537563. The reversal of 20537545 is 54573502.

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

It is a cyclic number.

It is not a de Polignac number, because 20537545 - 2¹⁵ = 20504777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 293359 + ... + 293428.

It is an arithmetic number, because the mean of its divisors is an integer number (3520728).

Almost surely, 2^20537545 is an apocalyptic number.

It is an amenable number.

20537545 is a deficient number, since it is larger than the sum of its proper divisors (7628279).

20537545 is an equidigital number, since it uses as much as digits as its factorization.

20537545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586799.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 20537545 is about 4531.8368240703. The cubic root of 20537545 is about 273.8521633094.

The spelling of 20537545 in words is "twenty million, five hundred thirty-seven thousand, five hundred forty-five".