18601097503 has 2 divisors, whose sum is σ = 18601097504. Its totient is φ = 18601097502.

The previous prime is 18601097483. The next prime is 18601097573. The reversal of 18601097503 is 30579010681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18601097503 - 2²¹ = 18599000351 is a prime.

It is a super-2 number, since 2×18601097503² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18601097573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9300548751 + 9300548752.

It is an arithmetic number, because the mean of its divisors is an integer number (9300548752).

Almost surely, 2^18601097503 is an apocalyptic number.

18601097503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18601097503 is an equidigital number, since it uses as much as digits as its factorization.

18601097503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 18601097503 in words is "eighteen billion, six hundred one million, ninety-seven thousand, five hundred three".