18603485731 has 2 divisors, whose sum is σ = 18603485732. Its totient is φ = 18603485730.

The previous prime is 18603485689. The next prime is 18603485737. The reversal of 18603485731 is 13758430681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18603485731 - 2¹¹ = 18603483683 is a prime.

It is a super-2 number, since 2×18603485731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18603485737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9301742865 + 9301742866.

It is an arithmetic number, because the mean of its divisors is an integer number (9301742866).

Almost surely, 2^18603485731 is an apocalyptic number.

18603485731 is a deficient number, since it is larger than the sum of its proper divisors (1).

18603485731 is an equidigital number, since it uses as much as digits as its factorization.

18603485731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 18603485731 in words is "eighteen billion, six hundred three million, four hundred eighty-five thousand, seven hundred thirty-one".