18700147573 has 2 divisors, whose sum is σ = 18700147574. Its totient is φ = 18700147572.

The previous prime is 18700147559. The next prime is 18700147597. The reversal of 18700147573 is 37574100781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10036633489 + 8663514084 = 100183^2 + 93078^2 .

It is a cyclic number.

It is not a de Polignac number, because 18700147573 - 2⁹ = 18700147061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18700147553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350073786 + 9350073787.

It is an arithmetic number, because the mean of its divisors is an integer number (9350073787).

Almost surely, 2^18700147573 is an apocalyptic number.

It is an amenable number.

18700147573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700147573 is an equidigital number, since it uses as much as digits as its factorization.

18700147573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 18700147573 in words is "eighteen billion, seven hundred million, one hundred forty-seven thousand, five hundred seventy-three".