20145437 has 8 divisors (see below), whose sum is σ = 21743904. Its totient is φ = 18553968.

The previous prime is 20145421. The next prime is 20145449. The reversal of 20145437 is 73454102.

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 20145437 - 2⁴ = 20145421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145407) 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, 5318 + ... + 8280.

It is an arithmetic number, because the mean of its divisors is an integer number (2717988).

Almost surely, 2^20145437 is an apocalyptic number.

It is an amenable number.

20145437 is a deficient number, since it is larger than the sum of its proper divisors (1598467).

20145437 is a wasteful number, since it uses less digits than its factorization.

20145437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20145437 is about 4488.3668522081. The cubic root of 20145437 is about 272.0981344645.

Adding to 20145437 its reverse (73454102), we get a palindrome (93599539).

The spelling of 20145437 in words is "twenty million, one hundred forty-five thousand, four hundred thirty-seven".