18388427153 has 2 divisors, whose sum is σ = 18388427154. Its totient is φ = 18388427152.

The previous prime is 18388427131. The next prime is 18388427173. The reversal of 18388427153 is 35172488381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16499916304 + 1888510849 = 128452^2 + 43457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18388427153 is a prime.

It is a super-2 number, since 2×18388427153² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18388427173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9194213576 + 9194213577.

It is an arithmetic number, because the mean of its divisors is an integer number (9194213577).

Almost surely, 2^18388427153 is an apocalyptic number.

It is an amenable number.

18388427153 is a deficient number, since it is larger than the sum of its proper divisors (1).

18388427153 is an equidigital number, since it uses as much as digits as its factorization.

18388427153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 50.

The spelling of 18388427153 in words is "eighteen billion, three hundred eighty-eight million, four hundred twenty-seven thousand, one hundred fifty-three".