18603572623 has 2 divisors, whose sum is σ = 18603572624. Its totient is φ = 18603572622.

The previous prime is 18603572597. The next prime is 18603572629. The reversal of 18603572623 is 32627530681.

It is a strong prime.

It is an emirp because it is prime and its reverse (32627530681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18603572623 - 2¹³ = 18603564431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18603572623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18603572629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9301786311 + 9301786312.

It is an arithmetic number, because the mean of its divisors is an integer number (9301786312).

Almost surely, 2^18603572623 is an apocalyptic number.

18603572623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18603572623 is an equidigital number, since it uses as much as digits as its factorization.

18603572623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 18603572623 in words is "eighteen billion, six hundred three million, five hundred seventy-two thousand, six hundred twenty-three".