20147315459 has 4 divisors (see below), whose sum is σ = 20373689880. Its totient is φ = 19920941040.

The previous prime is 20147315393. The next prime is 20147315477. The reversal of 20147315459 is 95451374102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20147315459 - 2²⁸ = 19878880003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20147315759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113187077 + ... + 113187254.

It is an arithmetic number, because the mean of its divisors is an integer number (5093422470).

Almost surely, 2^20147315459 is an apocalyptic number.

20147315459 is a deficient number, since it is larger than the sum of its proper divisors (226374421).

20147315459 is an equidigital number, since it uses as much as digits as its factorization.

20147315459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226374420.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 20147315459 in words is "twenty billion, one hundred forty-seven million, three hundred fifteen thousand, four hundred fifty-nine".