20145316237 has 4 divisors (see below), whose sum is σ = 20400320320. Its totient is φ = 19890312156.

The previous prime is 20145316223. The next prime is 20145316249. The reversal of 20145316237 is 73261354102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20145316237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145316207) 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, 127501923 + ... + 127502080.

It is an arithmetic number, because the mean of its divisors is an integer number (5100080080).

Almost surely, 2^20145316237 is an apocalyptic number.

It is an amenable number.

20145316237 is a deficient number, since it is larger than the sum of its proper divisors (255004083).

20145316237 is an equidigital number, since it uses as much as digits as its factorization.

20145316237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255004082.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20145316237 in words is "twenty billion, one hundred forty-five million, three hundred sixteen thousand, two hundred thirty-seven".