18747307147 has 2 divisors, whose sum is σ = 18747307148. Its totient is φ = 18747307146.

The previous prime is 18747307099. The next prime is 18747307157. The reversal of 18747307147 is 74170374781.

It is a strong prime.

It is an emirp because it is prime and its reverse (74170374781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18747307147 - 2¹¹ = 18747305099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18747307147.

It is not a weakly prime, because it can be changed into another prime (18747307157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9373653573 + 9373653574.

It is an arithmetic number, because the mean of its divisors is an integer number (9373653574).

Almost surely, 2^18747307147 is an apocalyptic number.

18747307147 is a deficient number, since it is larger than the sum of its proper divisors (1).

18747307147 is an equidigital number, since it uses as much as digits as its factorization.

18747307147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921984, while the sum is 49.

The spelling of 18747307147 in words is "eighteen billion, seven hundred forty-seven million, three hundred seven thousand, one hundred forty-seven".